linux-2.6-microblaze.git
3 years agoirqchip/mtk-cirq: Convert to a platform driver
Saravana Kannan [Sat, 18 Jul 2020 00:06:37 +0000 (17:06 -0700)]
irqchip/mtk-cirq: Convert to a platform driver

This driver can work as a platform driver. So covert it to a platform
driver.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Hanks Chen <hanks.chen@mediatek.com>
Link: https://lore.kernel.org/r/20200718000637.3632841-5-saravanak@google.com
3 years agoirqchip/mtk-sysirq: Convert to a platform driver
Saravana Kannan [Sat, 18 Jul 2020 00:06:36 +0000 (17:06 -0700)]
irqchip/mtk-sysirq: Convert to a platform driver

This driver can work as a platform driver. So covert it to a platform
driver.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Hanks Chen <hanks.chen@mediatek.com>
Link: https://lore.kernel.org/r/20200718000637.3632841-4-saravanak@google.com
3 years agoirqchip/qcom-pdc: Switch to using IRQCHIP_PLATFORM_DRIVER helper macros
Saravana Kannan [Sat, 18 Jul 2020 00:06:35 +0000 (17:06 -0700)]
irqchip/qcom-pdc: Switch to using IRQCHIP_PLATFORM_DRIVER helper macros

Switch the driver to use the helper macros. In addition to reducing the
number of lines, this also adds module unload protection (if the driver
is compiled as a module) by switching from module_platform_driver to
builtin_platform_driver.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200718000637.3632841-3-saravanak@google.com
3 years agoirqchip: Add IRQCHIP_PLATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros
Saravana Kannan [Sat, 18 Jul 2020 00:06:34 +0000 (17:06 -0700)]
irqchip: Add IRQCHIP_PLATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros

Compiling an irqchip driver as a platform driver needs to bunch of
things to be done right:
- Making sure the parent domain is initialized first
- Making sure the device can't be unbound from sysfs
- Disallowing module unload if it's built as a module
- Finding the parent node
- Etc.

Instead of trying to make sure all future irqchip platform drivers get
this right, provide boilerplate macros that take care of all of this.

An example use would look something like this. Where acme_foo_init and
acme_bar_init are similar to what would be passed to IRQCHIP_DECLARE.

IRQCHIP_PLATFORM_DRIVER_BEGIN(acme_irq)
IRQCHIP_MATCH("acme,foo", acme_foo_init)
IRQCHIP_MATCH("acme,bar", acme_bar_init)
IRQCHIP_PLATFORM_DRIVER_END(acme_irq)

Signed-off-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: https://lore.kernel.org/r/20200718000637.3632841-2-saravanak@google.com
3 years agoirqchip: irq-bcm2836.h: drop a duplicated word
Randy Dunlap [Sun, 19 Jul 2020 00:28:53 +0000 (17:28 -0700)]
irqchip: irq-bcm2836.h: drop a duplicated word

Drop the repeated word "the" in a comment.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200719002853.20419-1-rdunlap@infradead.org
3 years agoirqchip/gic-v4.1: Ensure accessing the correct RD when writing INVALLR
Zenghui Yu [Mon, 20 Jul 2020 09:23:28 +0000 (17:23 +0800)]
irqchip/gic-v4.1: Ensure accessing the correct RD when writing INVALLR

The GICv4.1 spec tells us that it's CONSTRAINED UNPREDICTABLE to issue a
register-based invalidation operation for a vPEID not mapped to that RD,
or another RD within the same CommonLPIAff group.

To follow this rule, commit f3a059219bc7 ("irqchip/gic-v4.1: Ensure mutual
exclusion between vPE affinity change and RD access") tried to address the
race between the RD accesses and the vPE affinity change, but somehow
forgot to take GICR_INVALLR into account. Let's take the vpe_lock before
evaluating vpe->col_idx to fix it.

Fixes: f3a059219bc7 ("irqchip/gic-v4.1: Ensure mutual exclusion between vPE affinity change and RD access")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200720092328.708-1-yuzenghui@huawei.com
3 years agoirqchip/irq-bcm7038-l1: Guard uses of cpu_logical_map
Florian Fainelli [Fri, 24 Jul 2020 18:41:56 +0000 (11:41 -0700)]
irqchip/irq-bcm7038-l1: Guard uses of cpu_logical_map

cpu_logical_map is only defined for CONFIG_SMP builds, when we are in an
UP configuration, the boot CPU is 0.

Fixes: 6468fc18b006 ("irqchip/irq-bcm7038-l1: Add PM support")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200724184157.29150-1-f.fainelli@gmail.com
3 years agoirqchip/gic-v3: Remove unused register definition
Zenghui Yu [Tue, 30 Jun 2020 13:41:26 +0000 (21:41 +0800)]
irqchip/gic-v3: Remove unused register definition

[maz: The GICv3 spec has evolved quite a bit since the draft the Linux
driver was written against, and some register definitions are simply gone]

As per the GICv3 specification, GIC{D,R}_SEIR are not assigned and the
locations (0x0068) are actually Reserved. GICR_MOV{LPI,ALL}R are two IMP
DEF registers and might be defined by some specific micro-architecture.

As they're not used anywhere in the kernel, just drop all of them.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
[maz: added context explaination]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200630134126.880-1-yuzenghui@huawei.com
3 years agoirqchip/qcom-pdc: Allow QCOM_PDC to be loadable as a permanent module
John Stultz [Fri, 10 Jul 2020 23:18:24 +0000 (23:18 +0000)]
irqchip/qcom-pdc: Allow QCOM_PDC to be loadable as a permanent module

Allows qcom-pdc driver to be loaded as a permanent module

Also, due to the fact that IRQCHIP_DECLARE becomes a no-op when
building as a module, we have to replace it with platform driver
hooks explicitly.

Thanks to Saravana for his help on pointing out the
IRQCHIP_DECLARE issue and guidance on a solution.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Maulik Shah <mkshah@codeaurora.org>
Cc: Lina Iyer <ilina@codeaurora.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-gpio@vger.kernel.org
Link: https://lore.kernel.org/r/20200710231824.60699-4-john.stultz@linaro.org
3 years agogenirq: Export irq_chip_retrigger_hierarchy and irq_chip_set_vcpu_affinity_parent
John Stultz [Fri, 10 Jul 2020 23:18:23 +0000 (23:18 +0000)]
genirq: Export irq_chip_retrigger_hierarchy and irq_chip_set_vcpu_affinity_parent

Add EXPORT_SYMBOL_GPL entries for irq_chip_retrigger_hierarchy()
and irq_chip_set_vcpu_affinity_parent() so that we can allow
drivers like the qcom-pdc driver to be loadable as a module.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Maulik Shah <mkshah@codeaurora.org>
Cc: Lina Iyer <ilina@codeaurora.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-gpio@vger.kernel.org
Link: https://lore.kernel.org/r/20200710231824.60699-3-john.stultz@linaro.org
3 years agoirqdomain: Export irq_domain_update_bus_token
John Stultz [Fri, 10 Jul 2020 23:18:22 +0000 (23:18 +0000)]
irqdomain: Export irq_domain_update_bus_token

Add export for irq_domain_update_bus_token() so that
we can allow drivers like the qcom-pdc driver to be
loadable as a module.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Maulik Shah <mkshah@codeaurora.org>
Cc: Lina Iyer <ilina@codeaurora.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: iommu@lists.linux-foundation.org
Cc: linux-gpio@vger.kernel.org
Link: https://lore.kernel.org/r/20200710231824.60699-2-john.stultz@linaro.org
3 years agoirqchip/mips-gic: Make local symbols static
Wei Yongjun [Tue, 14 Jul 2020 14:22:45 +0000 (22:22 +0800)]
irqchip/mips-gic: Make local symbols static

The sparse tool complains as follows:

drivers/irqchip/irq-mips-gic.c:49:1: warning:
 symbol '__pcpu_scope_pcpu_masks' was not declared. Should it be static?
drivers/irqchip/irq-mips-gic.c:620:6: warning:
 symbol 'gic_ipi_domain_free' was not declared. Should it be static?
drivers/irqchip/irq-mips-gic.c:634:5: warning:
 symbol 'gic_ipi_domain_match' was not declared. Should it be static?

Those symbols are not used outside of irq-mips-gic.c, so marks
them static.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200714142245.16124-1-weiyongjun1@huawei.com
3 years agogenirq/irqdomain: Remove redundant NULL pointer check on fwnode
Zenghui Yu [Thu, 16 Jul 2020 08:39:05 +0000 (16:39 +0800)]
genirq/irqdomain: Remove redundant NULL pointer check on fwnode

The is_fwnode_irqchip() helper will check if the fwnode_handle is empty.
There is no need to perform a redundant check outside of it.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200716083905.287-1-yuzenghui@huawei.com
3 years agoirqchip/ativic32: Constify irq_domain_ops
Masahiro Yamada [Tue, 14 Jul 2020 17:38:57 +0000 (02:38 +0900)]
irqchip/ativic32: Constify irq_domain_ops

This is passed to irq_domain_add_linear(), which accepts a pointer
to a const structure.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200714173857.477422-1-masahiroy@kernel.org
3 years agoirqchip/stm32-exti: Use the hwspin_lock_timeout_in_atomic() API
Fabien Dessenne [Mon, 6 Jul 2020 08:11:15 +0000 (10:11 +0200)]
irqchip/stm32-exti: Use the hwspin_lock_timeout_in_atomic() API

Now that the hwspin_lock_timeout_in_atomic() API is available use it.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200706081115.25180-1-alexandre.torgue@st.com
3 years agoirqchip/loongson-liointc: Fix potential dead lock
Tiezhu Yang [Tue, 7 Jul 2020 02:12:51 +0000 (10:12 +0800)]
irqchip/loongson-liointc: Fix potential dead lock

In the function liointc_set_type(), we need to call the function
irq_gc_unlock_irqrestore() before returning.

Fixes: dbb152267908 ("irqchip: Add driver for Loongson I/O Local Interrupt Controller")
Reported-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-8-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-pch-msi: Remove unneeded variable
Tiezhu Yang [Tue, 7 Jul 2020 02:12:50 +0000 (10:12 +0800)]
irqchip/loongson-pch-msi: Remove unneeded variable

irq_domain_alloc_irqs_parent() returns 0 on success and non-zero value
on failure, it is redudant to check its non-zero return value and then
return it, so just remove the variable "ret" and return directly in the
function pch_msi_parent_domain_alloc().

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-7-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-pch-pic: Check return value of irq_domain_translate_twocell()
Tiezhu Yang [Tue, 7 Jul 2020 02:12:49 +0000 (10:12 +0800)]
irqchip/loongson-pch-pic: Check return value of irq_domain_translate_twocell()

Check the return value of irq_domain_translate_twocell() due to
it may returns -EINVAL if failed and use variable fwspec for it,
and then use a new variable parent_fwspec which is proper for
irq_domain_alloc_irqs_parent().

Fixes: ef8c01eb64ca ("irqchip: Add Loongson PCH PIC controller")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-6-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-htvec: Check return value of irq_domain_translate_onecell()
Tiezhu Yang [Tue, 7 Jul 2020 02:12:48 +0000 (10:12 +0800)]
irqchip/loongson-htvec: Check return value of irq_domain_translate_onecell()

Check the return value of irq_domain_translate_onecell() due to
it may returns -EINVAL if failed.

Fixes: 818e915fbac5 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-5-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-htvec: Fix potential resource leak
Tiezhu Yang [Tue, 7 Jul 2020 02:12:47 +0000 (10:12 +0800)]
irqchip/loongson-htvec: Fix potential resource leak

In the function htvec_of_init(), system resource "parent_irq"
was not released in an error case. Thus add a jump target for
the completion of the desired exception handling.

Fixes: 818e915fbac5 ("irqchip: Add Loongson HyperTransport Vector support")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-4-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-htpic: Remove unneeded select of I8259
Tiezhu Yang [Tue, 7 Jul 2020 02:12:46 +0000 (10:12 +0800)]
irqchip/loongson-htpic: Remove unneeded select of I8259

LOONGSON_HTPIC depends on MACH_LOONGSON64 and MACH_LOONGSON64 already
selects I8259 in arch/mips/Kconfig, so no need to select I8259 again
when config LOONGSON_HTPIC.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-3-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/loongson-htpic: Remove redundant kfree operation
Tiezhu Yang [Tue, 7 Jul 2020 02:12:45 +0000 (10:12 +0800)]
irqchip/loongson-htpic: Remove redundant kfree operation

In the function htpic_of_init(), when kzalloc htpic fails, it should
return -ENOMEM directly, no need to execute "goto" to kfree.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1594087972-21715-2-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/irq-bcm7038-l1: Allow building on ARM 32-bit
Florian Fainelli [Thu, 9 Jul 2020 23:41:41 +0000 (16:41 -0700)]
irqchip/irq-bcm7038-l1: Allow building on ARM 32-bit

We need to have a definition for cpu_logical_map[] which on ARM
platforms is provided by asm/smp_plat.h. This header is not
automatically included from linux/smp.h and untangling it is a bit
difficult.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709234141.4901-1-f.fainelli@gmail.com
3 years agoirqchip/brcmstb-l2: Match UPG_AUX_AON_INTR2 compatible
Florian Fainelli [Thu, 9 Jul 2020 22:30:16 +0000 (15:30 -0700)]
irqchip/brcmstb-l2: Match UPG_AUX_AON_INTR2 compatible

The UPG_AUX_AON_INTR2 Level 2 interrupt controller node is defined with
the "brcm,upg-aux-aon-l2-intc" compatible string in Device Tree and
behaves as an edge triggered standard Broadcom STB L2 interrupt
controller.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-7-f.fainelli@gmail.com
3 years agodt-bindings: interrupt-controller: Document UPG auxiliary L2
Florian Fainelli [Thu, 9 Jul 2020 22:30:15 +0000 (15:30 -0700)]
dt-bindings: interrupt-controller: Document UPG auxiliary L2

Define the compatible string brcm,upg-aux-aon-l2-intc which is used by
the Broadcom STB UPG auxiliary always-on interrupt controller.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-6-f.fainelli@gmail.com
3 years agoirqchip/brcmstb-l2: Match HIF_SPI_INTR2 compatible
Kamal Dasu [Thu, 9 Jul 2020 22:30:14 +0000 (15:30 -0700)]
irqchip/brcmstb-l2: Match HIF_SPI_INTR2 compatible

The HIF_SPI_INTR2 Level 2 interrupt controller node is defined with the
"brcm,hif-spi-l2-intc" compatible string in Device Tree and behaves as
an edge triggered standard Broadcom STB L2 interrupt controller.

Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-5-f.fainelli@gmail.com
3 years agodt-bindings: interrupt-controller: Document Broadcom STB HIF L2
Florian Fainelli [Thu, 9 Jul 2020 22:30:13 +0000 (15:30 -0700)]
dt-bindings: interrupt-controller: Document Broadcom STB HIF L2

Add documentation for the brcm,hif-spi-l2-intc compatible string to the
brcm,l2-intc.txt binding document.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-4-f.fainelli@gmail.com
3 years agoirqchip/brcmstb-l2: Set controller as wake-up source
Justin Chen [Thu, 9 Jul 2020 22:30:12 +0000 (15:30 -0700)]
irqchip/brcmstb-l2: Set controller as wake-up source

Utilize the Broadcom interrupt controller standard property
"brcm,irq-can-wake" to flag whether this particular interrupt controller
instance is wake-up capable.

Since we do not know what type of parent interrupt controller we are
interfaced with, ensure that enable_irq_wake() is called early on.

Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-3-f.fainelli@gmail.com
3 years agoirqchip/bcm7120-l2: Set controller as wake-up source
Justin Chen [Thu, 9 Jul 2020 22:30:11 +0000 (15:30 -0700)]
irqchip/bcm7120-l2: Set controller as wake-up source

Utilize the Broadcom interrupt controller standard property
"brcm,irq-can-wake" to flag whether this particular interrupt controller
instance is wake-up capable.

Since we do not know what type of parent interrupt controller we are
interfaced with, ensure that enable_irq_wake() is called early on.

Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200709223016.989-2-f.fainelli@gmail.com
3 years agodrivers/acpi: Remove function cast
Oscar Carter [Sat, 30 May 2020 14:34:30 +0000 (16:34 +0200)]
drivers/acpi: Remove function cast

Remove the function cast in the ACPI_DECLARE_PROBE_ENTRY macro to ensure
that the functions passed as a last parameter to this macro have the
right prototype.

This is an effort to enable -Wcast-function-type in the top-level Makefile
to support Control Flow Integrity builds.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20200530143430.5203-4-oscar.carter@gmx.com
3 years agodrivers/irqchip: Use new macro ACPI_DECLARE_SUBTABLE_PROBE_ENTRY
Oscar Carter [Sat, 30 May 2020 14:34:29 +0000 (16:34 +0200)]
drivers/irqchip: Use new macro ACPI_DECLARE_SUBTABLE_PROBE_ENTRY

In an effort to enable -Wcast-function-type in the top-level Makefile to
support Control Flow Integrity builds, there are the need to remove all
the function callback casts.

To do this, modify the IRQCHIP_ACPI_DECLARE macro to use the new defined
macro ACPI_DECLARE_SUBTABLE_PROBE_ENTRY instead of the macro
ACPI_DECLARE_PROBE_ENTRY. This is necessary to be able to initialize the
the acpi_probe_entry struct using the probe_subtbl field instead of the
probe_table field and avoid function cast mismatches.

Also, modify the prototype of the functions used by the invocation of the
IRQCHIP_ACPI_DECLARE macro to match all the parameters.

Co-developed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20200530143430.5203-3-oscar.carter@gmx.com
3 years agodrivers/acpi: Add new macro ACPI_DECLARE_SUBTABLE_PROBE_ENTRY
Oscar Carter [Sat, 30 May 2020 14:34:28 +0000 (16:34 +0200)]
drivers/acpi: Add new macro ACPI_DECLARE_SUBTABLE_PROBE_ENTRY

In an effort to enable -Wcast-function-type in the top-level Makefile to
support Control Flow Integrity builds, there are the need to remove all
the function callback casts.

To do this, create a new macro called ACPI_DECLARE_SUBTABLE_PROBE_ENTRY
to initialize the acpi_probe_entry struct using the probe_subtbl field
instead of the probe_table field. This is a previous work to be able to
modify the IRQCHIP_ACPI_DECLARE macro to use this new defined macro.

Even though these two commented fields are part of a union, this is
necessary to avoid function cast mismatches. That is, due to the
IRQCHIP_ACPI_DECLARE invocations use as last parameter a function with
the protoype "int (*func)(struct acpi_subtable_header *, const unsigned
long)" it's necessary that this macro initialize the probe_subtbl field
of the acpi_probe_entry struct and not the probe_table field.

Co-developed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20200530143430.5203-2-oscar.carter@gmx.com
3 years agoirqchip/atmel-aic5: Add support for sam9x60 rtt fixup
Claudiu Beznea [Wed, 10 Jun 2020 09:05:34 +0000 (12:05 +0300)]
irqchip/atmel-aic5: Add support for sam9x60 rtt fixup

Add support for SAM9X60 RTT fixup.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1591779936-18577-2-git-send-email-claudiu.beznea@microchip.com
3 years agoirqchip/imx-intmux: Use struct_size() helper in devm_kzalloc()
Gustavo A. R. Silva [Tue, 16 Jun 2020 23:09:23 +0000 (18:09 -0500)]
irqchip/imx-intmux: Use struct_size() helper in devm_kzalloc()

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200616230923.GA24937@embeddedor
3 years agoirqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock
Bartosz Golaszewski [Mon, 15 Jun 2020 07:44:45 +0000 (09:44 +0200)]
irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock

This driver may take a regular spinlock when a raw spinlock
(irq_desc->lock) is already taken which results in the following
lockdep splat:

=============================
[ BUG: Invalid wait context ]
5.7.0-rc7 #1 Not tainted
-----------------------------
swapper/0/0 is trying to lock:
ffffff800303b798 (&chip_data->lock){....}-{3:3}, at: mtk_sysirq_set_type+0x48/0xc0
other info that might help us debug this:
context-{5:5}
2 locks held by swapper/0/0:
 #0: ffffff800302ee68 (&desc->request_mutex){....}-{4:4}, at: __setup_irq+0xc4/0x8a0
 #1: ffffff800302ecf0 (&irq_desc_lock_class){....}-{2:2}, at: __setup_irq+0xe4/0x8a0
stack backtrace:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.7.0-rc7 #1
Hardware name: Pumpkin MT8516 (DT)
Call trace:
 dump_backtrace+0x0/0x180
 show_stack+0x14/0x20
 dump_stack+0xd0/0x118
 __lock_acquire+0x8c8/0x2270
 lock_acquire+0xf8/0x470
 _raw_spin_lock_irqsave+0x50/0x78
 mtk_sysirq_set_type+0x48/0xc0
 __irq_set_trigger+0x58/0x170
 __setup_irq+0x420/0x8a0
 request_threaded_irq+0xd8/0x190
 timer_of_init+0x1e8/0x2c4
 mtk_gpt_init+0x5c/0x1dc
 timer_probe+0x74/0xf4
 time_init+0x14/0x44
 start_kernel+0x394/0x4f0

Replace the spinlock_t with raw_spinlock_t to avoid this warning.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200615074445.3579-1-brgl@bgdev.pl
3 years agoirqchip/vic: Cut down the external API
Linus Walleij [Sun, 7 Jun 2020 21:51:24 +0000 (23:51 +0200)]
irqchip/vic: Cut down the external API

There are registers and functions in the header file
that are only used inside the driver. Move these into
the driver.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200607215124.48638-2-linus.walleij@linaro.org
3 years agoirqchip/vic: Drop cascaded intialization call
Linus Walleij [Sun, 7 Jun 2020 21:51:23 +0000 (23:51 +0200)]
irqchip/vic: Drop cascaded intialization call

We got rid of the last user of the cascaded intialization
from board files so drop this API.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200607215124.48638-1-linus.walleij@linaro.org
3 years agoirqchip/ti-sci-inta: Fix typo about MODULE_AUTHOR
Tiezhu Yang [Sat, 6 Jun 2020 09:50:17 +0000 (17:50 +0800)]
irqchip/ti-sci-inta: Fix typo about MODULE_AUTHOR

It should be "ti.com" instead of "ticom".

Fixes: 9f1463b86c13 ("irqchip/ti-sci-inta: Add support for Interrupt Aggregator driver")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/1591437017-5295-3-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/ti-sci-inta: Fix return value about devm_ioremap_resource()
Tiezhu Yang [Sat, 6 Jun 2020 09:50:16 +0000 (17:50 +0800)]
irqchip/ti-sci-inta: Fix return value about devm_ioremap_resource()

When call function devm_ioremap_resource(), we should use IS_ERR()
to check the return value and return PTR_ERR() if failed.

Fixes: 9f1463b86c13 ("irqchip/ti-sci-inta: Add support for Interrupt Aggregator driver")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/1591437017-5295-2-git-send-email-yangtiezhu@loongson.cn
3 years agoirqchip/ti-sci-inta: Remove dead code in ti_sci_inta_set_type()
Tiezhu Yang [Sat, 6 Jun 2020 09:50:15 +0000 (17:50 +0800)]
irqchip/ti-sci-inta: Remove dead code in ti_sci_inta_set_type()

In the function ti_sci_inta_set_type(), the statement "return -EINVAL;"
out of switch case is dead code, remove it.

Fixes: 9f1463b86c13 ("irqchip/ti-sci-inta: Add support for Interrupt Aggregator driver")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/1591437017-5295-1-git-send-email-yangtiezhu@loongson.cn
3 years agoLinux 5.8-rc2
Linus Torvalds [Sun, 21 Jun 2020 22:45:29 +0000 (15:45 -0700)]
Linux 5.8-rc2

3 years agoMerge tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 21 Jun 2020 22:41:24 +0000 (15:41 -0700)]
Merge tag 'selinux-pr-20200621' of git://git./linux/kernel/git/pcmoore/selinux

Pull SELinux fixes from Paul Moore:
 "Three small patches to fix problems in the SELinux code, all found via
  clang.

  Two patches fix potential double-free conditions and one fixes an
  undefined return value"

* tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: fix undefined return of cond_evaluate_expr
  selinux: fix a double free in cond_read_node()/cond_read_list()
  selinux: fix double free

3 years agoMerge tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Sun, 21 Jun 2020 20:04:57 +0000 (13:04 -0700)]
Merge tag 'pinctrl-v5.8-2' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:
 "Some early fixes collected during the first week after the merge
  window, all pretty self-evident, with the details below. The revert is
  the crucial thing.

   - Fix a warning on the Qualcomm SPMI GPIO chip being instatiated
     twice without a unique irqchip struct

   - Use the noirq variants of the suspend and resume callbacks in the
     Tegra driver

   - Clean up the errorpath on the MCP23s08 driver

   - Revert the use of devm_of_iomap() in the Freescale driver as it was
     regressing the platform

   - Add some missing pins in the Qualcomm IPQ6018 driver

   - Fix a simple documentation bug in the pinctrl-single driver"

* tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: single: fix function name in documentation
  pinctrl: qcom: ipq6018 Add missing pins in qpic pin group
  Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"
  pinctrl: mcp23s08: Split to three parts: fix ptr_ret.cocci warnings
  pinctrl: tegra: Use noirq suspend/resume callbacks
  pinctrl: qcom: spmi-gpio: fix warning about irq chip reusage

3 years agoMerge tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahi...
Linus Torvalds [Sun, 21 Jun 2020 19:44:52 +0000 (12:44 -0700)]
Merge tag 'kbuild-fixes-v5.8' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - fix -gz=zlib compiler option test for CONFIG_DEBUG_INFO_COMPRESSED

 - improve cc-option in scripts/Kbuild.include to clean up temp files

 - improve cc-option in scripts/Kconfig.include for more reliable
   compile option test

 - do not copy modules.builtin by 'make install' because it would break
   existing systems

 - use 'userprogs' syntax for watch_queue sample

* tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  samples: watch_queue: build sample program for target architecture
  Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n"
  scripts: Fix typo in headers_install.sh
  kconfig: unify cc-option and as-option
  kbuild: improve cc-option to clean up all temporary files
  Makefile: Improve compressed debug info support detection

3 years agoMerge tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sun, 21 Jun 2020 17:02:53 +0000 (10:02 -0700)]
Merge tag 'powerpc-5.8-3' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - One fix for the interrupt rework we did last release which broke
   KVM-PR

 - Three commits fixing some fallout from the READ_ONCE() changes
   interacting badly with our 8xx 16K pages support, which uses a pte_t
   that is a structure of 4 actual PTEs

 - A cleanup of the 8xx pte_update() to use the newly added pmd_off()

 - A fix for a crash when handling an oops if CONFIG_DEBUG_VIRTUAL is
   enabled

 - A minor fix for the SPU syscall generation

Thanks to Aneesh Kumar K.V, Christian Zigotzky, Christophe Leroy, Mike
Rapoport, Nicholas Piggin.

* tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/8xx: Provide ptep_get() with 16k pages
  mm: Allow arches to provide ptep_get()
  mm/gup: Use huge_ptep_get() in gup_hugepte()
  powerpc/syscalls: Use the number when building SPU syscall table
  powerpc/8xx: use pmd_off() to access a PMD entry in pte_update()
  powerpc/64s: Fix KVM interrupt using wrong save area
  powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL

3 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sun, 21 Jun 2020 17:01:03 +0000 (10:01 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:

 - NULL dereference in octeontx

 - PM reference imbalance in ks-sa

 - deadlock in crypto manager

 - memory leak in drbg

 - missing socket limit check on receive SG list size in algif_skcipher

 - typos in caam

 - warnings in ccp and hisilicon

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: drbg - always try to free Jitter RNG instance
  crypto: marvell/octeontx - Fix a potential NULL dereference
  crypto: algboss - don't wait during notifier callback
  crypto: caam - fix typos
  crypto: ccp - Fix sparse warnings in sev-dev
  crypto: hisilicon - Cap block size at 2^31
  crypto: algif_skcipher - Cap recv SG list at ctx->used
  hwrng: ks-sa - Fix runtime PM imbalance on error

3 years agosamples: watch_queue: build sample program for target architecture
Masahiro Yamada [Wed, 17 Jun 2020 02:08:38 +0000 (11:08 +0900)]
samples: watch_queue: build sample program for target architecture

This userspace program includes UAPI headers exported to usr/include/.
'make headers' always works for the target architecture (i.e. the same
architecture as the kernel), so the sample program should be built for
the target as well. Kbuild now supports 'userprogs' for that.

I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because
$(CC) may not provide libc.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
3 years agoRevert "Makefile: install modules.builtin even if CONFIG_MODULES=n"
Masahiro Yamada [Fri, 19 Jun 2020 15:09:55 +0000 (00:09 +0900)]
Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n"

This reverts commit e0b250b57dcf403529081e5898a9de717f96b76b,
which broke build systems that need to install files to a certain
path, but do not set INSTALL_MOD_PATH when invoking 'make install'.

  $ make INSTALL_PATH=/tmp/destdir install
  mkdir: cannot create directory â€˜/lib/modules/5.8.0-rc1+/’: Permission denied
  Makefile:1342: recipe for target '_builtin_inst_' failed
  make: *** [_builtin_inst_] Error 1

While modules.builtin is useful also for CONFIG_MODULES=n, this change
in the behavior is quite unexpected. Maybe "make modules_install"
can install modules.builtin irrespective of CONFIG_MODULES as Jonas
originally suggested.

Anyway, that commit should be reverted ASAP.

Reported-by: Douglas Anderson <dianders@chromium.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
3 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 21 Jun 2020 02:23:13 +0000 (19:23 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "One minor fix and two patches reworking the ata dma drain for the
  !CONFIG_LIBATA case. The latter is a 5.7 regression fix"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: Wire up ata_scsi_dma_need_drain for SAS HBA drivers
  scsi: libata: Provide an ata_scsi_dma_need_drain stub for !CONFIG_ATA
  scsi: ufs-bsg: Fix runtime PM imbalance on error

3 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sun, 21 Jun 2020 02:18:27 +0000 (19:18 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:

 - a small collection of remaining API conversion patches (all acked)
   which allow to finally remove the deprecated API

 - some documentation fixes and a MAINTAINERS addition

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: Add robert and myself as qcom i2c cci maintainers
  i2c: smbus: Fix spelling mistake in the comments
  Documentation/i2c: SMBus start signal is S not A
  i2c: remove deprecated i2c_new_device API
  Documentation: media: convert to use i2c_new_client_device()
  video: backlight: tosa_lcd: convert to use i2c_new_client_device()
  x86/platform/intel-mid: convert to use i2c_new_client_device()
  drm: encoder_slave: use new I2C API
  drm: encoder_slave: fix refcouting error for modules

3 years agopinctrl: single: fix function name in documentation
Drew Fustini [Fri, 12 Jun 2020 11:27:58 +0000 (13:27 +0200)]
pinctrl: single: fix function name in documentation

Use the correct the function name in the documentation for
"pcs_parse_one_pinctrl_entry()".

"smux_parse_one_pinctrl_entry()" appears to be an artifact from the
development of a prior patch series ("simple pinmux driver") which
transformed into pinctrl-single.

Signed-off-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20200612112758.GA3407886@x1
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
3 years agoMerge tag 'trace-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 20 Jun 2020 20:17:47 +0000 (13:17 -0700)]
Merge tag 'trace-v5.8-rc1' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Have recordmcount work with > 64K sections (to support LTO)

 - kprobe RCU fixes

 - Correct a kprobe critical section with missing mutex

 - Remove redundant arch_disarm_kprobe() call

 - Fix lockup when kretprobe triggers within kprobe_flush_task()

 - Fix memory leak in fetch_op_data operations

 - Fix sleep in atomic in ftrace trace array sample code

 - Free up memory on failure in sample trace array code

 - Fix incorrect reporting of function_graph fields in format file

 - Fix quote within quote parsing in bootconfig

 - Fix return value of bootconfig tool

 - Add testcases for bootconfig tool

 - Fix maybe uninitialized warning in ftrace pid file code

 - Remove unused variable in tracing_iter_reset()

 - Fix some typos

* tag 'trace-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  ftrace: Fix maybe-uninitialized compiler warning
  tools/bootconfig: Add testcase for show-command and quotes test
  tools/bootconfig: Fix to return 0 if succeeded to show the bootconfig
  tools/bootconfig: Fix to use correct quotes for value
  proc/bootconfig: Fix to use correct quotes for value
  tracing: Remove unused event variable in tracing_iter_reset
  tracing/probe: Fix memleak in fetch_op_data operations
  trace: Fix typo in allocate_ftrace_ops()'s comment
  tracing: Make ftrace packed events have align of 1
  sample-trace-array: Remove trace_array 'sample-instance'
  sample-trace-array: Fix sleeping function called from invalid context
  kretprobe: Prevent triggering kretprobe from within kprobe_flush_task
  kprobes: Remove redundant arch_disarm_kprobe() call
  kprobes: Fix to protect kick_kprobe_optimizer() by kprobe_mutex
  kprobes: Use non RCU traversal APIs on kprobe_tables if possible
  kprobes: Suppress the suspicious RCU warning on kprobes
  recordmcount: support >64k sections

3 years agoMerge tag 'libnvdimm-for-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 20 Jun 2020 20:13:21 +0000 (13:13 -0700)]
Merge tag 'libnvdimm-for-5.8-rc2' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm updates from Dan Williams:
 "A feature (papr_scm health retrieval) and a fix (sysfs attribute
  visibility) for v5.8.

  Vaibhav explains in the merge commit below why missing v5.8 would be
  painful and I agreed to try a -rc2 pull because only cosmetics kept
  this out of -rc1 and his initial versions were posted in more than
  enough time for v5.8 consideration:

   'These patches are tied to specific features that were committed to
    customers in upcoming distros releases (RHEL and SLES) whose
    time-lines are tied to 5.8 kernel release.

    Being able to track the health of an nvdimm is critical for our
    customers that are running workloads leveraging papr-scm nvdimms.
    Missing the 5.8 kernel would mean missing the distro timelines and
    shifting forward the availability of this feature in distro kernels
    by at least 6 months'

  Summary:

   - Fix the visibility of the region 'align' attribute.

     The new unit tests for region alignment handling caught a corner
     case where the alignment cannot be specified if the region is
     converted from static to dynamic provisioning at runtime.

   - Add support for device health retrieval for the persistent memory
     supported by the papr_scm driver.

     This includes both the standard sysfs "health flags" that the nfit
     persistent memory driver publishes and a mechanism for the ndctl
     tool to retrieve a health-command payload"

* tag 'libnvdimm-for-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  nvdimm/region: always show the 'align' attribute
  powerpc/papr_scm: Implement support for PAPR_PDSM_HEALTH
  ndctl/papr_scm,uapi: Add support for PAPR nvdimm specific methods
  powerpc/papr_scm: Improve error logging and handling papr_scm_ndctl()
  powerpc/papr_scm: Fetch nvdimm health information from PHYP
  seq_buf: Export seq_buf_printf
  powerpc: Document details on H_SCM_HEALTH hcall

3 years agopinctrl: qcom: ipq6018 Add missing pins in qpic pin group
Sivaprakash Murugesan [Fri, 19 Jun 2020 04:31:29 +0000 (10:01 +0530)]
pinctrl: qcom: ipq6018 Add missing pins in qpic pin group

The patch adds missing qpic data pins to qpic pingroup. These pins are
necessary for the qpic nand to work.

Fixes: ef1ea54eab0e ("pinctrl: qcom: Add ipq6018 pinctrl driver")
Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Link: https://lore.kernel.org/r/1592541089-17700-1-git-send-email-sivaprak@codeaurora.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
3 years agoRevert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in...
Haibo Chen [Tue, 9 Jun 2020 03:27:03 +0000 (11:27 +0800)]
Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"

This reverts commit ba403242615c2c99e27af7984b1650771a2cc2c9.

After commit 26d8cde5260b ("pinctrl: freescale: imx: add shared
input select reg support"). i.MX7D has two iomux controllers
iomuxc and iomuxc-lpsr which share select_input register for
daisy chain settings.
If use 'devm_of_iomap()', when probe the iomuxc-lpsr, will call
devm_request_mem_region() for the region <0x30330000-0x3033ffff>
for the first time. Then, next time when probe the iomuxc, API
devm_platform_ioremap_resource() will also use the API
devm_request_mem_region() for the share region <0x30330000-0x3033ffff>
again, then cause issue, log like below:

[    0.179561] imx7d-pinctrl 302c0000.iomuxc-lpsr: initialized IMX pinctrl driver
[    0.191742] imx7d-pinctrl 30330000.pinctrl: can't request region for resource [mem 0x30330000-0x3033ffff]
[    0.191842] imx7d-pinctrl: probe of 30330000.pinctrl failed with error -16

Fixes: ba403242615c ("pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'")
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Link: https://lore.kernel.org/r/1591673223-1680-1-git-send-email-haibo.chen@nxp.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
3 years agoMerge tag 's390-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 20 Jun 2020 19:31:08 +0000 (12:31 -0700)]
Merge tag 's390-5.8-2' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Vasily Gorbik:

 - a few ptrace fixes mostly for strace and seccomp_bpf kernel tests
   findings

 - cleanup unused pm callbacks in virtio ccw

 - replace kmalloc + memset with kzalloc in crypto

 - use $(LD) for vDSO linkage to make clang happy

 - fix vDSO clock_getres() to preserve the same behaviour as
   posix_get_hrtimer_res()

 - fix workqueue cpumask warning when NUMA=n and nr_node_ids=2

 - reduce SLSB writes during input processing, improve warnings and
   cleanup qdio_data usage in qdio

 - a few fixes to use scnprintf() instead of snprintf()

* tag 's390-5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: fix syscall_get_error for compat processes
  s390/qdio: warn about unexpected SLSB states
  s390/qdio: clean up usage of qdio_data
  s390/numa: let NODES_SHIFT depend on NEED_MULTIPLE_NODES
  s390/vdso: fix vDSO clock_getres()
  s390/vdso: Use $(LD) instead of $(CC) to link vDSO
  s390/protvirt: use scnprintf() instead of snprintf()
  s390: use scnprintf() in sys_##_prefix##_##_name##_show
  s390/crypto: use scnprintf() instead of snprintf()
  s390/zcrypt: use kzalloc
  s390/virtio: remove unused pm callbacks
  s390/qdio: reduce SLSB writes during Input Queue processing
  selftests/seccomp: s390 shares the syscall and return value register
  s390/ptrace: fix setting syscall number
  s390/ptrace: pass invalid syscall numbers to tracing
  s390/ptrace: return -ENOSYS when invalid syscall is supplied
  s390/seccomp: pass syscall arguments via seccomp_data
  s390/qdio: fine-tune SLSB update

3 years agoMerge tag 'riscv-for-linus-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 20 Jun 2020 19:14:29 +0000 (12:14 -0700)]
Merge tag 'riscv-for-linus-5.8-rc2' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:

 - a workaround for a compiler surprise related to the "r" inline
   assembly that allows LLVM to boot.

 - a fix to avoid WX-only mappings, which the ISA does not allow. While
   this probably manifests in many ways, the bug was found in stress-ng.

 - a missing lock in set_direct_map_*(), which due to a recent lockdep
   change started asserting.

* tag 'riscv-for-linus-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Acquire mmap lock before invoking walk_page_range
  RISC-V: Don't allow write+exec only page mapping request in mmap
  riscv/atomic: Fix sign extension for RV64I

3 years agoMerge tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 20 Jun 2020 19:10:09 +0000 (12:10 -0700)]
Merge tag 'linux-kselftest-5.8-rc2' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest cleanups from Shuah Khan:

 - ftrace "requires:" list for simplifying and unifying requirement
   checks for each test case, adding "requires:" line instead of
   checking required ftrace interfaces in each test case.

 - a minor spelling correction patch

* tag 'linux-kselftest-5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftrace: Support ":README" suffix for requires
  selftests/ftrace: Support ":tracer" suffix for requires
  selftests/ftrace: Convert check_filter_file() with requires list
  selftests/ftrace: Convert required interface checks into requires list
  selftests/ftrace: Add "requires:" list support
  selftests/ftrace: Return unsupported for the unconfigured features
  selftests/ftrace: Allow ":" in description
  tools: testing: ftrace: trigger: fix spelling mistake

3 years agoafs: Fix hang on rmmod due to outstanding timer
David Howells [Fri, 19 Jun 2020 22:39:36 +0000 (23:39 +0100)]
afs: Fix hang on rmmod due to outstanding timer

The fileserver probe timer, net->fs_probe_timer, isn't cancelled when
the kafs module is being removed and so the count it holds on
net->servers_outstanding doesn't get dropped..

This causes rmmod to wait forever.  The hung process shows a stack like:

afs_purge_servers+0x1b5/0x23c [kafs]
afs_net_exit+0x44/0x6e [kafs]
ops_exit_list+0x72/0x93
unregister_pernet_operations+0x14c/0x1ba
unregister_pernet_subsys+0x1d/0x2a
afs_exit+0x29/0x6f [kafs]
__do_sys_delete_module.isra.0+0x1a2/0x24b
do_syscall_64+0x51/0x95
entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fix this by:

 (1) Attempting to cancel the probe timer and, if successful, drop the
     count that the timer was holding.

 (2) Make the timer function just drop the count and not schedule the
     prober if the afs portion of net namespace is being destroyed.

Also, whilst we're at it, make the following changes:

 (3) Initialise net->servers_outstanding to 1 and decrement it before
     waiting on it so that it doesn't generate wake up events by being
     decremented to 0 until we're cleaning up.

 (4) Switch the atomic_dec() on ->servers_outstanding for ->fs_timer in
     afs_purge_servers() to use the helper function for that.

Fixes: f6cbb368bcb0 ("afs: Actively poll fileservers to maintain NAT or firewall openings")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoafs: Fix afs_do_lookup() to call correct fetch-status op variant
David Howells [Thu, 18 Jun 2020 23:01:28 +0000 (00:01 +0100)]
afs: Fix afs_do_lookup() to call correct fetch-status op variant

Fix afs_do_lookup()'s fallback case for when FS.InlineBulkStatus isn't
supported by the server.

In the fallback, it calls FS.FetchStatus for the specific vnode it's
meant to be looking up.  Commit b6489a49f7b7 broke this by renaming one
of the two identically-named afs_fetch_status_operation descriptors to
something else so that one of them could be made non-static.  The site
that used the renamed one, however, wasn't renamed and didn't produce
any warning because the other was declared in a header.

Fix this by making afs_do_lookup() use the renamed variant.

Note that there are two variants of the success method because one is
called from ->lookup() where we may or may not have an inode, but can't
call iget until after we've talked to the server - whereas the other is
called from within iget where we have an inode, but it may or may not be
initialised.

The latter variant expects there to be an inode, but because it's being
called from there former case, there might not be - resulting in an oops
like the following:

  BUG: kernel NULL pointer dereference, address: 00000000000000b0
  ...
  RIP: 0010:afs_fetch_status_success+0x27/0x7e
  ...
  Call Trace:
    afs_wait_for_operation+0xda/0x234
    afs_do_lookup+0x2fe/0x3c1
    afs_lookup+0x3c5/0x4bd
    __lookup_slow+0xcd/0x10f
    walk_component+0xa2/0x10c
    path_lookupat.isra.0+0x80/0x110
    filename_lookup+0x81/0x104
    vfs_statx+0x76/0x109
    __do_sys_newlstat+0x39/0x6b
    do_syscall_64+0x4c/0x78
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: b6489a49f7b7 ("afs: Fix silly rename")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agopowerpc/8xx: Provide ptep_get() with 16k pages
Christophe Leroy [Mon, 15 Jun 2020 12:57:59 +0000 (12:57 +0000)]
powerpc/8xx: Provide ptep_get() with 16k pages

READ_ONCE() now enforces atomic read, which leads to:

  CC      mm/gup.o
In file included from ./include/linux/kernel.h:11:0,
                 from mm/gup.c:2:
In function 'gup_hugepte.constprop',
    inlined from 'gup_huge_pd.isra.79' at mm/gup.c:2465:8:
./include/linux/compiler.h:392:38: error: call to '__compiletime_assert_222' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                      ^
./include/linux/compiler.h:373:4: note: in definition of macro '__compiletime_assert'
    prefix ## suffix();    \
    ^
./include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert'
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
  ^
./include/linux/compiler.h:405:2: note: in expansion of macro 'compiletime_assert'
  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
  ^
./include/linux/compiler.h:291:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
  compiletime_assert_rwonce_type(x);    \
  ^
mm/gup.c:2428:8: note: in expansion of macro 'READ_ONCE'
  pte = READ_ONCE(*ptep);
        ^
In function 'gup_get_pte',
    inlined from 'gup_pte_range' at mm/gup.c:2228:9,
    inlined from 'gup_pmd_range' at mm/gup.c:2613:15,
    inlined from 'gup_pud_range' at mm/gup.c:2641:15,
    inlined from 'gup_p4d_range' at mm/gup.c:2666:15,
    inlined from 'gup_pgd_range' at mm/gup.c:2694:15,
    inlined from 'internal_get_user_pages_fast' at mm/gup.c:2795:3:
./include/linux/compiler.h:392:38: error: call to '__compiletime_assert_219' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                      ^
./include/linux/compiler.h:373:4: note: in definition of macro '__compiletime_assert'
    prefix ## suffix();    \
    ^
./include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert'
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
  ^
./include/linux/compiler.h:405:2: note: in expansion of macro 'compiletime_assert'
  compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
  ^
./include/linux/compiler.h:291:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
  compiletime_assert_rwonce_type(x);    \
  ^
mm/gup.c:2199:9: note: in expansion of macro 'READ_ONCE'
  return READ_ONCE(*ptep);
         ^
make[2]: *** [mm/gup.o] Error 1

Define ptep_get() on 8xx when using 16k pages.

Fixes: 9e343b467c70 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/341688399c1b102756046d19ea6ce39db1ae4742.1592225558.git.christophe.leroy@csgroup.eu
3 years agomm: Allow arches to provide ptep_get()
Christophe Leroy [Mon, 15 Jun 2020 12:57:58 +0000 (12:57 +0000)]
mm: Allow arches to provide ptep_get()

Since commit 9e343b467c70 ("READ_ONCE: Enforce atomicity for
{READ,WRITE}_ONCE() memory accesses") it is not possible anymore to
use READ_ONCE() to access complex page table entries like the one
defined for powerpc 8xx with 16k size pages.

Define a ptep_get() helper that architectures can override instead
of performing a READ_ONCE() on the page table entry pointer.

Fixes: 9e343b467c70 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/087fa12b6e920e32315136b998aa834f99242695.1592225558.git.christophe.leroy@csgroup.eu
3 years agomm/gup: Use huge_ptep_get() in gup_hugepte()
Christophe Leroy [Mon, 15 Jun 2020 12:57:57 +0000 (12:57 +0000)]
mm/gup: Use huge_ptep_get() in gup_hugepte()

gup_hugepte() reads hugepage table entries, it can't read
them directly, huge_ptep_get() must be used.

Fixes: 9e343b467c70 ("READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ffc3714334c3bfaca6f13788ad039e8759ae413f.1592225558.git.christophe.leroy@csgroup.eu
3 years agoMerge branch 'for-5.8/papr_scm' into libnvdimm-for-next
Dan Williams [Fri, 19 Jun 2020 21:18:51 +0000 (14:18 -0700)]
Merge branch 'for-5.8/papr_scm' into libnvdimm-for-next

Include the papr_scm health retrieval feature for v5.8-rc2. The
functionality was initially posted well in advance of the merge window,
but review comments and a late build-bot warning kept them out of the
v5.8-rc1 libnvdimm pull request.

Vaibhav notes:
These patches are tied to specific features that were committed to
customers in upcoming distros releases (RHEL and SLES) whose time-lines
are tied to 5.8 kernel release.

Being able to track the health of an nvdimm is critical for our
customers that are running workloads leveraging papr-scm nvdimms.
Missing the 5.8 kernel would mean missing the distro timelines and
shifting forward the availability of this feature in distro kernels by
at least 6 months.

3 years agoMerge tag 'io_uring-5.8-2020-06-19' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 19 Jun 2020 20:16:58 +0000 (13:16 -0700)]
Merge tag 'io_uring-5.8-2020-06-19' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - Catch a case where io_sq_thread() didn't do proper mm acquire

 - Ensure poll completions are reaped on shutdown

 - Async cancelation and run fixes (Pavel)

 - io-poll race fixes (Xiaoguang)

 - Request cleanup race fix (Xiaoguang)

* tag 'io_uring-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
  io_uring: fix possible race condition against REQ_F_NEED_CLEANUP
  io_uring: reap poll completions while waiting for refs to drop on exit
  io_uring: acquire 'mm' for task_work for SQPOLL
  io_uring: add memory barrier to synchronize io_kiocb's result and iopoll_completed
  io_uring: don't fail links for EAGAIN error in IOPOLL mode
  io_uring: cancel by ->task not pid
  io_uring: lazy get task
  io_uring: batch cancel in io_uring_cancel_files()
  io_uring: cancel all task's requests on exit
  io-wq: add an option to cancel all matched reqs
  io-wq: reorder cancellation pending -> running
  io_uring: fix lazy work init

3 years agoMerge tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 19 Jun 2020 20:11:26 +0000 (13:11 -0700)]
Merge tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Use import_uuid() where appropriate (Andy)

 - bcache fixes (Coly, Mauricio, Zhiqiang)

 - blktrace sparse warnings fix (Jan)

 - blktrace concurrent setup fix (Luis)

 - blkdev_get use-after-free fix (Jason)

 - Ensure all blk-mq maps are updated (Weiping)

 - Loop invalidate bdev fix (Zheng)

* tag 'block-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
  block: make function 'kill_bdev' static
  loop: replace kill_bdev with invalidate_bdev
  partitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense
  block: update hctx map when use multiple maps
  blktrace: Avoid sparse warnings when assigning q->blk_trace
  blktrace: break out of blktrace setup on concurrent calls
  block: Fix use-after-free in blkdev_get()
  trace/events/block.h: drop kernel-doc for dropped function parameter
  blk-mq: Remove redundant 'return' statement
  bcache: pr_info() format clean up in bcache_device_init()
  bcache: use delayed kworker fo asynchronous devices registration
  bcache: check and adjust logical block size for backing devices
  bcache: fix potential deadlock problem in btree_gc_coalesce

3 years agoMerge tag 'libata-5.8-2020-06-19' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 19 Jun 2020 20:09:40 +0000 (13:09 -0700)]
Merge tag 'libata-5.8-2020-06-19' of git://git.kernel.dk/linux-block

Pull libata fixes from Jens Axboe:
 "A few minor changes that should go into this release"

* tag 'libata-5.8-2020-06-19' of git://git.kernel.dk/linux-block:
  libata: Use per port sync for detach
  ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function
  sata_rcar: handle pm_runtime_get_sync failure cases

3 years agoMerge tag 'drm-fixes-2020-06-19' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 19 Jun 2020 19:40:57 +0000 (12:40 -0700)]
Merge tag 'drm-fixes-2020-06-19' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Just i915 and amd here.

  i915 has some workaround movement so they get applied at the right
  times, and a timeslicing fix, along with some display fixes.

  AMD has a few display floating point fix and a devcgroup fix for
  amdkfd.

  i915:
   - Fix for timeslicing and virtual engines/unpremptable requests (+ 1
     dependency patch)
   - Fixes into TypeC register programming and interrupt storm detecting
   - Disable DIP on MST ports with the transcoder clock still on
   - Avoid missing GT workarounds at reset for HSW and older gens
   - Fix for unwinding multiple requests missing force restore
   - Fix encoder type check for DDI vswing sequence
   - Build warning fixes

  amdgpu:
   - Fix kvfree/kfree mixup
   - Fix hawaii device id in powertune configuration
   - Display FP fixes
   - Documentation fixes

  amdkfd:
   - devcgroup check fix"

* tag 'drm-fixes-2020-06-19' of git://anongit.freedesktop.org/drm/drm: (23 commits)
  drm/amdgpu: fix documentation around busy_percentage
  drm/amdgpu/pm: update comment to clarify Overdrive interfaces
  drm/amdkfd: Use correct major in devcgroup check
  drm/i915/display: Fix the encoder type check
  drm/i915/icl+: Fix hotplug interrupt disabling after storm detection
  drm/i915/gt: Move gen4 GT workarounds from init_clock_gating to workarounds
  drm/i915/gt: Move ilk GT workarounds from init_clock_gating to workarounds
  drm/i915/gt: Move snb GT workarounds from init_clock_gating to workarounds
  drm/i915/gt: Move vlv GT workarounds from init_clock_gating to workarounds
  drm/i915/gt: Move ivb GT workarounds from init_clock_gating to workarounds
  drm/i915/gt: Move hsw GT workarounds from init_clock_gating to workarounds
  drm/i915/icl: Disable DIP on MST ports with the transcoder clock still on
  drm/i915/gt: Incrementally check for rewinding
  drm/i915/tc: fix the reset of ln0
  drm/i915/gt: Prevent timeslicing into unpreemptable requests
  drm/i915/selftests: Restore to default heartbeat
  drm/i915: work around false-positive maybe-uninitialized warning
  drm/i915/pmu: avoid an maybe-uninitialized warning
  drm/i915/gt: Incorporate the virtual engine into timeslicing
  drm/amd/display: Rework dsc to isolate FPU operations
  ...

3 years agoMerge tag 'ceph-for-5.8-rc2' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 19 Jun 2020 19:25:04 +0000 (12:25 -0700)]
Merge tag 'ceph-for-5.8-rc2' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "An important follow-up for replica reads support that went into -rc1
  and two target_copy() fixups"

* tag 'ceph-for-5.8-rc2' of git://github.com/ceph/ceph-client:
  libceph: don't omit used_replica in target_copy()
  libceph: don't omit recovery_deletes in target_copy()
  libceph: move away from global osd_req_flags

3 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 19 Jun 2020 19:19:12 +0000 (12:19 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Unfortunately, we still have a number of outstanding issues so there
  will be more fixes to come, but this lot are a good start.

   - Fix handling of watchpoints triggered by uaccess routines

   - Fix initialisation of gigantic pages for CMA buffers

   - Raise minimum clang version for BTI to avoid miscompilation

   - Fix data race in SVE vector length configuration code

   - Ensure address tags are ignored in kern_addr_valid()

   - Dump register state on fatal BTI exception

   - kexec_file() cleanup to use struct_size() macro"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints
  arm64: kexec_file: Use struct_size() in kmalloc()
  arm64: mm: reserve hugetlb CMA after numa_init
  arm64: bti: Require clang >= 10.0.1 for in-kernel BTI support
  arm64: sve: Fix build failure when ARM64_SVE=y and SYSCTL=n
  arm64: pgtable: Clear the GP bit for non-executable kernel pages
  arm64: mm: reset address tag set by kasan sw tagging
  arm64: traps: Dump registers prior to panic() in bad_mode()
  arm64/sve: Eliminate data races on sve_default_vl
  docs/arm64: Fix typo'd #define in sve.rst
  arm64: remove TEXT_OFFSET randomization

3 years agoMerge tag 'overflow-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees...
Linus Torvalds [Fri, 19 Jun 2020 18:45:03 +0000 (11:45 -0700)]
Merge tag 'overflow-v5.8-rc2' of git://git./linux/kernel/git/kees/linux

Pull flex-array size helper from Kees Cook:
 "During the treewide clean-ups of zero-length "flexible arrays", the
  struct_size() helper was heavily used, but it was noticed that many
  times it would have been nice to have an additional helper to get the
  size of just the flexible array itself.

  This need appears to be even more common when cleaning up the 1-byte
  array "flexible arrays", so Gustavo implemented it.

  I'd love to get this landed early so it can be used during the v5.9
  dev cycle to ease the 1-byte array cleanups."

* tag 'overflow-v5.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  overflow.h: Add flex_array_size() helper

3 years agoMerge tag 'perf-tools-fixes-2020-06-02' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 19 Jun 2020 18:39:57 +0000 (11:39 -0700)]
Merge tag 'perf-tools-fixes-2020-06-02' of git://git./linux/kernel/git/acme/linux

Pull perf tooling fixes from Arnaldo Carvalho de Melo:

 - Update various UAPI headers, some automatically adding support for a
   new MSR and the faccess2 syscall.

 - Fix corner case NULL deref in the histograms code.

 - Fix corner case NULL deref in 'perf stat' aggregation code.

 - Fix array pointer deref and old style declaration in the parsing of
   events.

 - Fix segfault when processing ZSTD compressed perf.data files in 'perf
   script' due to lack of initialization of the ZSTD library.

 - Handle __attribute__((user)) in libtraceevent fixing the parsing of
   syscall tracepoints with user buffers.

 - Make libtraevent aware of __builtin_expect() appearing in tracepoint
   fields.

 - Make the BPF prologue generation use bpf_probe_read_{user,kernel}().

 - Fix the '@user' attribute parsing in kprobes variables in 'perf
   probe'.

 - Fix error message when asking for -fsanitize=address without required
   libraries.

* tag 'perf-tools-fixes-2020-06-02' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (22 commits)
  perf build: Fix error message when asking for -fsanitize=address without required libraries
  tools lib traceevent: Add handler for __builtin_expect()
  tools lib traceevent: Handle __attribute__((user)) in field names
  tools lib traceevent: Add append() function helper for appending strings
  tools headers UAPI: Sync linux/fs.h with the kernel sources
  tools include UAPI: Sync linux/vhost.h with the kernel sources
  tools arch x86: Sync the msr-index.h copy with the kernel sources
  perf script: Initialize zstd_data
  perf pmu: Remove unused declaration
  perf parse-events: Fix an old style declaration
  perf parse-events: Fix an incompatible pointer
  perf bpf: Fix bpf prologue generation
  perf probe: Fix user attribute access in kprobes
  perf stat: Fix NULL pointer dereference
  perf report: Fix NULL pointer dereference in hists__fprintf_nr_sample_events()
  tools headers UAPI: Sync kvm.h headers with the kernel sources
  tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
  tools headers UAPI: Sync linux/fscrypt.h with the kernel sources
  perf beauty: Add support to STATX_MNT_ID in the 'statx' syscall 'mask' argument
  tools headers uapi: Sync linux/stat.h with the kernel sources
  ...

3 years agoMAINTAINERS: Add robert and myself as qcom i2c cci maintainers
Loic Poulain [Fri, 19 Jun 2020 10:17:44 +0000 (12:17 +0200)]
MAINTAINERS: Add robert and myself as qcom i2c cci maintainers

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
[wsa: kept sorting]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoi2c: smbus: Fix spelling mistake in the comments
Keyur Patel [Fri, 12 Jun 2020 21:26:35 +0000 (17:26 -0400)]
i2c: smbus: Fix spelling mistake in the comments

Fix spelling mistake in the comments with help of `codespell`.
seperate ==> separate

Signed-off-by: Keyur Patel <iamkeyur96@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoDocumentation/i2c: SMBus start signal is S not A
Daniel Schaefer [Sun, 14 Jun 2020 18:23:55 +0000 (20:23 +0200)]
Documentation/i2c: SMBus start signal is S not A

Just like all other I2C/SMBus commands, the start signal for the SMBus
Quick Command is S, not A.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Daniel Schaefer <git@danielschaefer.me>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoi2c: remove deprecated i2c_new_device API
Wolfram Sang [Mon, 15 Jun 2020 07:58:15 +0000 (09:58 +0200)]
i2c: remove deprecated i2c_new_device API

All in-tree users have been converted to the new i2c_new_client_device
function, so remove this deprecated one.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoDocumentation: media: convert to use i2c_new_client_device()
Wolfram Sang [Mon, 15 Jun 2020 07:58:14 +0000 (09:58 +0200)]
Documentation: media: convert to use i2c_new_client_device()

Move away from the deprecated API and advertise the new one.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agovideo: backlight: tosa_lcd: convert to use i2c_new_client_device()
Wolfram Sang [Mon, 15 Jun 2020 07:58:13 +0000 (09:58 +0200)]
video: backlight: tosa_lcd: convert to use i2c_new_client_device()

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agox86/platform/intel-mid: convert to use i2c_new_client_device()
Wolfram Sang [Mon, 15 Jun 2020 07:58:12 +0000 (09:58 +0200)]
x86/platform/intel-mid: convert to use i2c_new_client_device()

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agodrm: encoder_slave: use new I2C API
Wolfram Sang [Mon, 15 Jun 2020 07:58:11 +0000 (09:58 +0200)]
drm: encoder_slave: use new I2C API

i2c_new_client() is deprecated, use the replacement
i2c_new_client_device(). Also, we have a helper to check if a driver is
bound. Use it to simplify the code. Note that this changes the errno for
a failed device creation from ENOMEM to ENODEV. No callers currently
interpret this errno, though, so we use this condensed error check.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agodrm: encoder_slave: fix refcouting error for modules
Wolfram Sang [Mon, 15 Jun 2020 07:58:10 +0000 (09:58 +0200)]
drm: encoder_slave: fix refcouting error for modules

module_put() balances try_module_get(), not request_module(). Fix the
error path to match that.

Fixes: 2066facca4c7 ("drm/kms: slave encoder interface.")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
3 years agoRISC-V: Acquire mmap lock before invoking walk_page_range
Atish Patra [Wed, 17 Jun 2020 20:37:32 +0000 (13:37 -0700)]
RISC-V: Acquire mmap lock before invoking walk_page_range

As per walk_page_range documentation, mmap lock should be acquired by the
caller before invoking walk_page_range. mmap_assert_locked gets triggered
without that. The details can be found here.

http://lists.infradead.org/pipermail/linux-riscv/2020-June/010335.html

Fixes: 395a21ff859c(riscv: add ARCH_HAS_SET_DIRECT_MAP support)
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Michel Lespinasse <walken@google.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
3 years agoRISC-V: Don't allow write+exec only page mapping request in mmap
Yash Shah [Tue, 16 Jun 2020 14:03:06 +0000 (19:33 +0530)]
RISC-V: Don't allow write+exec only page mapping request in mmap

As per the table 4.4 of version "20190608-Priv-MSU-Ratified" of the
RISC-V instruction set manual[0], the PTE permission bit combination of
"write+exec only" is reserved for future use. Hence, don't allow such
mapping request in mmap call.

An issue is been reported by David Abdurachmanov, that while running
stress-ng with "sysbadaddr" argument, RCU stalls are observed on RISC-V
specific kernel.

This issue arises when the stress-sysbadaddr request for pages with
"write+exec only" permission bits and then passes the address obtain
from this mmap call to various system call. For the riscv kernel, the
mmap call should fail for this particular combination of permission bits
since it's not valid.

[0]: http://dabbelt.com/~palmer/keep/riscv-isa-manual/riscv-privileged-20190608-1.pdf

Signed-off-by: Yash Shah <yash.shah@sifive.com>
Reported-by: David Abdurachmanov <david.abdurachmanov@gmail.com>
[Palmer: Refer to the latest ISA specification at the only link I could
find, and update the terminology.]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
3 years agoMerge tag 'amd-drm-fixes-5.8-2020-06-17' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Fri, 19 Jun 2020 00:02:28 +0000 (10:02 +1000)]
Merge tag 'amd-drm-fixes-5.8-2020-06-17' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amd-drm-fixes-5.8-2020-06-17:

amdgpu:
- Fix kvfree/kfree mixup
- Fix hawaii device id in powertune configuration
- Display FP fixes
- Documentation fixes

amdkfd:
- devcgroup check fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200617220733.3773183-1-alexander.deucher@amd.com
3 years agoMerge tag 'drm-intel-fixes-2020-06-18' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 18 Jun 2020 23:45:47 +0000 (09:45 +1000)]
Merge tag 'drm-intel-fixes-2020-06-18' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix for timeslicing and virtual engines/unpremptable requests
  (+ 1 dependency patch)
- Fixes into TypeC register programming and interrupt storm detecting
- Disable DIP on MST ports with the transcoder clock still on
- Avoid missing GT workarounds at reset for HSW and older gens
- Fix for unwinding multiple requests missing force restore
- Fix encoder type check for DDI vswing sequence
- Build warning fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200618124659.GA12342@jlahtine-desk.ger.corp.intel.com
3 years agoMerge branch 'hch' (maccess patches from Christoph Hellwig)
Linus Torvalds [Thu, 18 Jun 2020 19:35:51 +0000 (12:35 -0700)]
Merge branch 'hch' (maccess patches from Christoph Hellwig)

Merge non-faulting memory access cleanups from Christoph Hellwig:
 "Andrew and I decided to drop the patches implementing your suggested
  rename of the probe_kernel_* and probe_user_* helpers from -mm as
  there were way to many conflicts.

  After -rc1 might be a good time for this as all the conflicts are
  resolved now"

This also adds a type safety checking patch on top of the renaming
series to make the subtle behavioral difference between 'get_user()' and
'get_kernel_nofault()' less potentially dangerous and surprising.

* emailed patches from Christoph Hellwig <hch@lst.de>:
  maccess: make get_kernel_nofault() check for minimal type compatibility
  maccess: rename probe_kernel_address to get_kernel_nofault
  maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault
  maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

3 years agomaccess: make get_kernel_nofault() check for minimal type compatibility
Linus Torvalds [Thu, 18 Jun 2020 19:10:37 +0000 (12:10 -0700)]
maccess: make get_kernel_nofault() check for minimal type compatibility

Now that we've renamed probe_kernel_address() to get_kernel_nofault()
and made it look and behave more in line with get_user(), some of the
subtle type behavior differences end up being more obvious and possibly
dangerous.

When you do

        get_user(val, user_ptr);

the type of the access comes from the "user_ptr" part, and the above
basically acts as

        val = *user_ptr;

by design (except, of course, for the fact that the actual dereference
is done with a user access).

Note how in the above case, the type of the end result comes from the
pointer argument, and then the value is cast to the type of 'val' as
part of the assignment.

So the type of the pointer is ultimately the more important type both
for the access itself.

But 'get_kernel_nofault()' may now _look_ similar, but it behaves very
differently.  When you do

        get_kernel_nofault(val, kernel_ptr);

it behaves like

        val = *(typeof(val) *)kernel_ptr;

except, of course, for the fact that the actual dereference is done with
exception handling so that a faulting access is suppressed and returned
as the error code.

But note how different the casting behavior of the two superficially
similar accesses are: one does the actual access in the size of the type
the pointer points to, while the other does the access in the size of
the target, and ignores the pointer type entirely.

Actually changing get_kernel_nofault() to act like get_user() is almost
certainly the right thing to do eventually, but in the meantime this
patch adds logit to at least verify that the pointer type is compatible
with the type of the result.

In many cases, this involves just casting the pointer to 'void *' to
make it obvious that the type of the pointer is not the important part.
It's not how 'get_user()' acts, but at least the behavioral difference
is now obvious and explicit.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agomaccess: rename probe_kernel_address to get_kernel_nofault
Christoph Hellwig [Wed, 17 Jun 2020 07:37:55 +0000 (09:37 +0200)]
maccess: rename probe_kernel_address to get_kernel_nofault

Better describe what this helper does, and match the naming of
copy_from_kernel_nofault.

Also switch the argument order around, so that it acts and looks
like get_user().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agosparse: use identifiers to define address spaces
Luc Van Oostenryck [Wed, 17 Jun 2020 22:02:26 +0000 (00:02 +0200)]
sparse: use identifiers to define address spaces

Currently, address spaces in warnings are displayed as '<asn:X>' with
'X' being the address space's arbitrary number.

But since sparse v0.6.0-rc1 (late December 2018), sparse allows you to
define the address spaces using an identifier instead of a number.  This
identifier is then directly used in the warnings.

So, use the identifiers '__user', '__iomem', '__percpu' & '__rcu' for
the corresponding address spaces.  The default address space, __kernel,
being not displayed in warnings, stays defined as '0'.

With this change, warnings that used to be displayed as:

cast removes address space '<asn:1>' of expression
... void [noderef] <asn:2> *

will now be displayed as:

cast removes address space '__user' of expression
... void [noderef] __iomem *

This also moves the __kernel annotation to be the first one, since it is
quite different from the others because it's the default one, and so:

 - it's never displayed

 - it's normally not needed, nor in type annotations, nor in cast
   between address spaces. The only time it's needed is when it's
   combined with a typeof to express "the same type as this one but
   without the address space"

 - it can't be defined with a name, '0' must be used.

So, it seemed strange to me to have it in the middle of the other
ones.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoblock: make function 'kill_bdev' static
Zheng Bin [Thu, 18 Jun 2020 04:21:38 +0000 (12:21 +0800)]
block: make function 'kill_bdev' static

kill_bdev does not have any external user, so make it static.

Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agoloop: replace kill_bdev with invalidate_bdev
Zheng Bin [Thu, 18 Jun 2020 04:21:37 +0000 (12:21 +0800)]
loop: replace kill_bdev with invalidate_bdev

When a filesystem is mounted on a loop device and on a loop ioctl
LOOP_SET_STATUS64, because of kill_bdev, buffer_head mappings are getting
destroyed.
kill_bdev
  truncate_inode_pages
    truncate_inode_pages_range
      do_invalidatepage
        block_invalidatepage
          discard_buffer  -->clear BH_Mapped flag

sb_bread
  __bread_gfp
  bh = __getblk_gfp
  -->discard_buffer clear BH_Mapped flag
  __bread_slow
    submit_bh
      submit_bh_wbc
        BUG_ON(!buffer_mapped(bh))  --> hit this BUG_ON

Fixes: 5db470e229e2 ("loop: drop caches if offset or block_size are changed")
Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agolibata: Use per port sync for detach
Kai-Heng Feng [Wed, 3 Jun 2020 07:48:19 +0000 (15:48 +0800)]
libata: Use per port sync for detach

Commit 130f4caf145c ("libata: Ensure ata_port probe has completed before
detach") may cause system freeze during suspend.

Using async_synchronize_full() in PM callbacks is wrong, since async
callbacks that are already scheduled may wait for not-yet-scheduled
callbacks, causes a circular dependency.

Instead of using big hammer like async_synchronize_full(), use async
cookie to make sure port probe are synced, without affecting other
scheduled PM callbacks.

Fixes: 130f4caf145c ("libata: Ensure ata_port probe has completed before detach")
Suggested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: John Garry <john.garry@huawei.com>
BugLink: https://bugs.launchpad.net/bugs/1867983
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agopartitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense
Andy Shevchenko [Wed, 22 Apr 2020 13:03:17 +0000 (16:03 +0300)]
partitions/ldm: Replace uuid_copy() with import_uuid() where it makes sense

There is a specific API to treat raw data as UUID, i.e. import_uuid().
Use it instead of uuid_copy() with explicit casting.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agoio_uring: fix possible race condition against REQ_F_NEED_CLEANUP
Xiaoguang Wang [Thu, 18 Jun 2020 07:01:56 +0000 (15:01 +0800)]
io_uring: fix possible race condition against REQ_F_NEED_CLEANUP

In io_read() or io_write(), when io request is submitted successfully,
it'll go through the below sequence:

    kfree(iovec);
    req->flags &= ~REQ_F_NEED_CLEANUP;
    return ret;

But clearing REQ_F_NEED_CLEANUP might be unsafe. The io request may
already have been completed, and then io_complete_rw_iopoll()
and io_complete_rw() will be called, both of which will also modify
req->flags if needed. This causes a race condition, with concurrent
non-atomic modification of req->flags.

To eliminate this race, in io_read() or io_write(), if io request is
submitted successfully, we don't remove REQ_F_NEED_CLEANUP flag. If
REQ_F_NEED_CLEANUP is set, we'll leave __io_req_aux_free() to the
iovec cleanup work correspondingly.

Cc: stable@vger.kernel.org
Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
3 years agoperf build: Fix error message when asking for -fsanitize=address without required...
Tiezhu Yang [Thu, 18 Jun 2020 02:06:01 +0000 (10:06 +0800)]
perf build: Fix error message when asking for -fsanitize=address without required libraries

When build perf with ASan or UBSan, if libasan or libubsan can not find,
the feature-glibc is 0 and there exists the following error log which is
wrong, because we can find gnu/libc-version.h in /usr/include,
glibc-devel is also installed.

  [yangtiezhu@linux perf]$ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'
    BUILD:   Doing 'make -j4' parallel build
    HOSTCC   fixdep.o
    HOSTLD   fixdep-in.o
    LINK     fixdep
  <stdin>:1:0: warning: -fsanitize=address and -fsanitize=kernel-address are not supported for this target
  <stdin>:1:0: warning: -fsanitize=address not supported for this target

  Auto-detecting system features:
  ...                         dwarf: [ OFF ]
  ...            dwarf_getlocations: [ OFF ]
  ...                         glibc: [ OFF ]
  ...                          gtk2: [ OFF ]
  ...                      libaudit: [ OFF ]
  ...                        libbfd: [ OFF ]
  ...                        libcap: [ OFF ]
  ...                        libelf: [ OFF ]
  ...                       libnuma: [ OFF ]
  ...        numa_num_possible_cpus: [ OFF ]
  ...                       libperl: [ OFF ]
  ...                     libpython: [ OFF ]
  ...                     libcrypto: [ OFF ]
  ...                     libunwind: [ OFF ]
  ...            libdw-dwarf-unwind: [ OFF ]
  ...                          zlib: [ OFF ]
  ...                          lzma: [ OFF ]
  ...                     get_cpuid: [ OFF ]
  ...                           bpf: [ OFF ]
  ...                        libaio: [ OFF ]
  ...                       libzstd: [ OFF ]
  ...        disassembler-four-args: [ OFF ]

  Makefile.config:393: *** No gnu/libc-version.h found, please install glibc-dev[el].  Stop.
  Makefile.perf:224: recipe for target 'sub-make' failed
  make[1]: *** [sub-make] Error 2
  Makefile:69: recipe for target 'all' failed
  make: *** [all] Error 2
  [yangtiezhu@linux perf]$ ls /usr/include/gnu/libc-version.h
  /usr/include/gnu/libc-version.h

After install libasan and libubsan, the feature-glibc is 1 and the build
process is success, so the cause is related with libasan or libubsan, we
should check them and print an error log to reflect the reality.

Committer testing:

  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf
  $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address' O=/tmp/build/perf -C tools/perf/ install-bin
  make: Entering directory '/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j12' parallel build
    HOSTCC   /tmp/build/perf/fixdep.o
    HOSTLD   /tmp/build/perf/fixdep-in.o
    LINK     /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ OFF ]
  ...            dwarf_getlocations: [ OFF ]
  ...                         glibc: [ OFF ]
  ...                          gtk2: [ OFF ]
  ...                        libbfd: [ OFF ]
  ...                        libcap: [ OFF ]
  ...                        libelf: [ OFF ]
  ...                       libnuma: [ OFF ]
  ...        numa_num_possible_cpus: [ OFF ]
  ...                       libperl: [ OFF ]
  ...                     libpython: [ OFF ]
  ...                     libcrypto: [ OFF ]
  ...                     libunwind: [ OFF ]
  ...            libdw-dwarf-unwind: [ OFF ]
  ...                          zlib: [ OFF ]
  ...                          lzma: [ OFF ]
  ...                     get_cpuid: [ OFF ]
  ...                           bpf: [ OFF ]
  ...                        libaio: [ OFF ]
  ...                       libzstd: [ OFF ]
  ...        disassembler-four-args: [ OFF ]

  Makefile.config:401: *** No libasan found, please install libasan.  Stop.
  make[1]: *** [Makefile.perf:231: sub-make] Error 2
  make: *** [Makefile:70: all] Error 2
  make: Leaving directory '/home/acme/git/perf/tools/perf'
  $
  $
  $ sudo dnf install libasan
  <SNIP>
  Installed:
    libasan-9.3.1-2.fc31.x86_64
  $
  $
  $ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address' O=/tmp/build/perf -C tools/perf/ install-bin
  make: Entering directory '/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j12' parallel build

  Auto-detecting system features:
  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  ...                          gtk2: [ on  ]
  ...                        libbfd: [ on  ]
  ...                        libcap: [ on  ]
  ...                        libelf: [ on  ]
  ...                       libnuma: [ on  ]
  ...        numa_num_possible_cpus: [ on  ]
  ...                       libperl: [ on  ]
  ...                     libpython: [ on  ]
  ...                     libcrypto: [ on  ]
  ...                     libunwind: [ on  ]
  ...            libdw-dwarf-unwind: [ on  ]
  ...                          zlib: [ on  ]
  ...                          lzma: [ on  ]
  ...                     get_cpuid: [ on  ]
  ...                           bpf: [ on  ]
  ...                        libaio: [ on  ]
  ...                       libzstd: [ on  ]
  ...        disassembler-four-args: [ on  ]
   <SNIP>
    CC       /tmp/build/perf/util/pmu-flex.o
    FLEX     /tmp/build/perf/util/expr-flex.c
    CC       /tmp/build/perf/util/expr-bison.o
    CC       /tmp/build/perf/util/expr.o
    CC       /tmp/build/perf/util/expr-flex.o
    CC       /tmp/build/perf/util/parse-events-flex.o
    CC       /tmp/build/perf/util/parse-events.o
    LD       /tmp/build/perf/util/intel-pt-decoder/perf-in.o
    LD       /tmp/build/perf/util/perf-in.o
    LD       /tmp/build/perf/perf-in.o
    LINK     /tmp/build/perf/perf
  <SNIP>
    INSTALL  python-scripts
    INSTALL  perf_completion-script
    INSTALL  perf-tip
  make: Leaving directory '/home/acme/git/perf/tools/perf'
  $ ldd ~/bin/perf | grep asan
   libasan.so.5 => /lib64/libasan.so.5 (0x00007f0904164000)
  $

And if we rebuild without -fsanitize-address:

  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf
  $ make O=/tmp/build/perf -C tools/perf/ install-bin
  make: Entering directory '/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j12' parallel build
    HOSTCC   /tmp/build/perf/fixdep.o
    HOSTLD   /tmp/build/perf/fixdep-in.o
    LINK     /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  ...                          gtk2: [ on  ]
  ...                        libbfd: [ on  ]
  ...                        libcap: [ on  ]
  ...                        libelf: [ on  ]
  ...                       libnuma: [ on  ]
  ...        numa_num_possible_cpus: [ on  ]
  ...                       libperl: [ on  ]
  ...                     libpython: [ on  ]
  ...                     libcrypto: [ on  ]
  ...                     libunwind: [ on  ]
  ...            libdw-dwarf-unwind: [ on  ]
  ...                          zlib: [ on  ]
  ...                          lzma: [ on  ]
  ...                     get_cpuid: [ on  ]
  ...                           bpf: [ on  ]
  ...                        libaio: [ on  ]
  ...                       libzstd: [ on  ]
  ...        disassembler-four-args: [ on  ]

    GEN      /tmp/build/perf/common-cmds.h
    CC       /tmp/build/perf/exec-cmd.o
  <SNIP>
    INSTALL  perf_completion-script
    INSTALL  perf-tip
  make: Leaving directory '/home/acme/git/perf/tools/perf'
  $ ldd ~/bin/perf | grep asan
  $

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: tiezhu yang <yangtiezhu@loongson.cn>
Cc: xuefeng li <lixuefeng@loongson.cn>
Link: http://lore.kernel.org/lkml/1592445961-28044-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools lib traceevent: Add handler for __builtin_expect()
Steven Rostedt (VMware) [Tue, 24 Mar 2020 20:08:48 +0000 (16:08 -0400)]
tools lib traceevent: Add handler for __builtin_expect()

In order to move pointer checks like IS_ERR_VALUE() out of the hotpath
and into the reader path of a trace event, user space tools need to be
able to parse that. IS_ERR_VALUE() is defined as:

 #define IS_ERR_VALUE() unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)

Which eventually turns into:

  __builtin_expect(!!((unsigned long)(void *)(x) >= (unsigned long)-4095), 0)

Now the traceevent parser can handle most of that except for the
__builtin_expect(), which needs to be added.

Link: https://lore.kernel.org/linux-mm/20200320055823.27089-3-jaewon31.kim@samsung.com/
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jaewon Kim <jaewon31.kim@samsung.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-mm@kvack.org
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200324200956.821799393@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools lib traceevent: Handle __attribute__((user)) in field names
Steven Rostedt (VMware) [Tue, 24 Mar 2020 20:08:47 +0000 (16:08 -0400)]
tools lib traceevent: Handle __attribute__((user)) in field names

Commit c61f13eaa1ee1 ("gcc-plugins: Add structleak for more stack
initialization") added "__attribute__((user))" to the user when
stackleak detector is enabled. This now appears in the field format of
system call trace events for system calls that have user buffers. The
"__attribute__((user))" breaks the parsing in libtraceevent. That needs
to be handled.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jaewon Kim <jaewon31.kim@samsung.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-mm@kvack.org
Cc: linux-trace-devel@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200324200956.663647256@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agotools lib traceevent: Add append() function helper for appending strings
Steven Rostedt (VMware) [Tue, 24 Mar 2020 20:08:46 +0000 (16:08 -0400)]
tools lib traceevent: Add append() function helper for appending strings

There's several locations that open code realloc and strcat() to append
text to strings. Add an append() function that takes a delimiter and a
string to append to another string.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jaewon Lim <jaewon31.kim@samsung.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: linux-mm@kvack.org
Cc: linux-trace-devel@vger.kernel.org
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Link: http://lore.kernel.org/lkml/20200324200956.515118403@goodmis.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 years agoarm64: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints
Will Deacon [Fri, 29 May 2020 13:12:18 +0000 (14:12 +0100)]
arm64: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints

Unprivileged memory accesses generated by the so-called "translated"
instructions (e.g. STTR) at EL1 can cause EL0 watchpoints to fire
unexpectedly if kernel debugging is enabled. In such cases, the
hw_breakpoint logic will invoke the user overflow handler which will
typically raise a SIGTRAP back to the current task. This is futile when
returning back to the kernel because (a) the signal won't have been
delivered and (b) userspace can't handle the thing anyway.

Avoid invoking the user overflow handler for watchpoints triggered by
kernel uaccess routines, and instead single-step over the faulting
instruction as we would if no overflow handler had been installed.

(Fixes tag identifies the introduction of unprivileged memory accesses,
 which exposed this latent bug in the hw_breakpoint code)

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Fixes: 57f4959bad0a ("arm64: kernel: Add support for User Access Override")
Reported-by: Luis Machado <luis.machado@linaro.org>
Signed-off-by: Will Deacon <will@kernel.org>
3 years agoarm64: kexec_file: Use struct_size() in kmalloc()
Gustavo A. R. Silva [Wed, 17 Jun 2020 21:34:07 +0000 (16:34 -0500)]
arm64: kexec_file: Use struct_size() in kmalloc()

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200617213407.GA1385@embeddedor
Signed-off-by: Will Deacon <will@kernel.org>