dt-bindings: pinctrl: qcom: Define common TLMM binding

Several properties are shared between all TLMM bindings. By providing a
common binding to define these properties each platform's binding can be
reduced to just listing which of these properties should be checked for
- or further specified.

Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210126042650.1725176-1-bjorn.andersson@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: qcom: Add SM8350 pinctrl driver

This adds pincontrol driver for tlmm block found in SM8350 SoC

This patch is based on initial code downstream by Raghavendra.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210205140132.274242-3-vkoul@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: pinctrl: qcom: Add SM8350 pinctrl bindings

Add device tree binding Documentation details for Qualcomm SM8350
pinctrl driver.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20210205140132.274242-2-vkoul@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: samsung: use raw_spinlock for s3c64xx

Convert spin_[lock|unlock] functions of pin bank to
raw_spinlock to support preempt-rt for pinctrl-s3c64xx. Below patch
converted spinlock_t to raw_spinlock_t but it didn't convert the
s3c64xx's spinlock.

Fixes: 1f306ecbe0f6 ("pinctrl: samsung: use raw_spinlock for locking")
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Link: https://lore.kernel.org/r/20210127001631.91209-1-chanho61.park@samsung.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: mediatek: mt8192: Fix dt_binding_check warning

Silence indentation level warning reported by dt_binding_check in
order to reduce noise during routine checks.

$ make dt_binding_check
mt8192-mt6359-rt1015-rt5682.yaml:10:4: [warning] wrong indentation:
expected 2 but found 3 (indentation)

Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://lore.kernel.org/r/20210126132531.2084711-2-robert.foss@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: qcom: spmi-mpp: Add PM8019 compatible

PM8019 provides 6 MPPs. Add a compatible to support them.

Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210115171115.123155-2-konrad.dybcio@somainline.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Merge tag 'intel-pinctrl-v5.12-1' of gitolite.pub/scm/linux/kernel/git/pinctrl/intel into devel

intel-pinctrl for v5.12-1

* Enable pin control on Intel Alder Lake-P
* Traverse through capabilities, convert them to features for the future use

The following is an automated git shortlog grouped by driver:

intel:
 -  Convert capability list to features
 -  Drop unnecessary check for predefined features
 -  Split intel_pinctrl_add_padgroups() for better maintenance

tigerlake:
 -  Add Alder Lake-P ACPI ID

Merge tag 'v5.11-rc2' into devel

Linux 5.11-rc2

pinctrl: pinmux: add function selector to pinmux-functions

Add the function selector to the pinmux-functions debugfs output. This
is an integer which is the index into the pinmux function tree.  It will
make it easier to correlate function name to function selector without
having to count the lines in the output.

Example output of "pinmux-functions":

function 0: pinmux-uart0-pins, groups = [ pinmux-uart0-pins ]
function 1: pinmux-uart1-pins, groups = [ pinmux-uart1-pins ]
function 2: pinmux-uart2-pins, groups = [ pinmux-uart2-pins ]
function 3: pinmux-mmc0-pins, groups = [ pinmux-mmc0-pins ]
function 3: pinmux-mmc1-pins, groups = [ pinmux-mmc1-pins ]
function 5: pinmux-i2c0-pins, groups = [ pinmux-i2c0-pins ]
function 6: pinmux-i2c1-pins, groups = [ pinmux-i2c1-pins ]
function 7: pinmux-i2c2-pins, groups = [ pinmux-i2c2-pins ]
function 8: pinmux-pwm0-pins, groups = [ pinmux-pwm0-pins ]
function 9: pinmux-pwm1-pins, groups = [ pinmux-pwm1-pins ]
function 10: pinmux-adc-pins, groups = [ pinmux-adc-pins ]

Cc: Jason Kridner <jkridner@beagleboard.org>
Cc: Robert Nelson <robertcnelson@beagleboard.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20210123202212.528046-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: samsung: use raw_spinlock for locking

This patch converts spin_[lock|unlock] functions of pin bank to
raw_spinlock to support preempt-rt. This can avoid BUG() assertion when
irqchip callbacks are triggerred. Spinlocks can be converted rt_mutex
which is preemptible when we apply preempt-rt patches.

According to "Documentation/driver-api/gpio/driver.rst",

"Realtime considerations: a realtime compliant GPIO driver should not
use spinlock_t or any sleepable APIs (like PM runtime) as part of its
irqchip implementation.

- spinlock_t should be replaced with raw_spinlock_t.[1]
"

Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20210121030009.25673-1-chanho61.park@samsung.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: clarify #pinctrl-cells for pinctrl-single,pins

Document that #pinctrl-cells can be 1 or 2 for pinctrl-single,pins

Fixes: 27c90e5e48d0 ("ARM: dts: am33xx-l4: change #pinctrl-cells from 1 to 2")
Reported-by: Emmanuel Vadot <manu@bidouilliste.com>
Link: https://lore.kernel.org/linux-gpio/20210115190201.9273b637a7f967e7e55bc740@bidouilliste.com/
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Drew Fustini <drew@beagleboard.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Link: https://lore.kernel.org/r/20210120050342.320704-1-drew@beagleboard.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: actions: Add the platform dependency to drivers

The Actions Semi pinctrl drivers are a mix of both ARM32 and ARM64
platforms. So let's add the correct platform dependency to avoid them
being selected on the other.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210121062547.27173-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: sunxi: Add support for the Allwinner H616-R pin controller

There are only two pins left now, used to connect to the PMIC via I2C.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Link: https://lore.kernel.org/r/20210118020848.11721-6-andre.przywara@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: sunxi: Add support for the Allwinner H616 pin controller

Port A is used for an internal connection to some analogue circuitry
which looks like an AC200 IP (as in the H6), though this is not
mentioned in the manual.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20210118020848.11721-5-andre.przywara@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: pinctrl: Add Allwinner H616 compatible strings

A new SoC, a new compatible string.
Also we were too miserly with just allowing seven interrupt banks.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20210118020848.11721-4-andre.przywara@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ingenic: Improve JZ4760 support

- Add otg function and otg-vbus group.

- Add lcd-8bit, lcd-16bit, lcd-18bit, lcd-generic and lcd-special
  groups. Change the lcd-24bit group so that it only selects the pins
  that aren't in the lcd-18bit and lcd-generic groups (which breaks
  Device Tree in theory, but there is none out there for any JZ4760
  based board, yet). Remove the lcd-no-pins group which is just useless.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20210120110722.20133-1-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: remove ste u300 driver

The ST-Ericsson U300 platform is getting removed, so this driver is no
longer needed.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120132045.2127659-6-arnd@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: remove coh901 driver

The ST-Ericsson U300 platform is getting removed, so this driver is no
longer needed.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120132045.2127659-5-arnd@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: remove sirf atlas/prima drivers

The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.

Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Barry Song <baohua@kernel.org>
Link: https://lore.kernel.org/r/20210120132045.2127659-4-arnd@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: remove zte zx driver

The zte zx platform is getting removed, so this driver is no
longer needed.

Cc: Jun Nie <jun.nie@linaro.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210120132045.2127659-3-arnd@kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: pinctrl: pinctrl-microchip-sgpio: Fix indentation

yamllint warns:
./Documentation/devicetree/bindings/pinctrl/microchip,sparx5-sgpio.yaml
  102:10  error   wrong indentation: expected 10 but found 9 (indentation)

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20210116015350.3501927-1-j.neuschaefer@gmx.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: bcm: Simplify bool comparison

Fix the follow coccicheck warnings:

./drivers/pinctrl/bcm/pinctrl-ns2-mux.c:856:29-38: WARNING:
Comparison to bool.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Link: https://lore.kernel.org/r/1610705349-24310-1-git-send-email-abaci-bugfix@linux.alibaba.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ingenic: Only support SoCs enabled in config

Tested on a JZ4740 system (ARCH=mips make qi_lb60_defconfig), this saves
about 14 KiB, by allowing the compiler to garbage-collect all the
functions and tables that correspond to SoCs that were disabled in the
config.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20201213235447.138271-2-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

kconfig.h: Add IF_ENABLED() macro

IF_ENABLED(CONFIG_FOO, ptr) evaluates to (ptr) if CONFIG_FOO is set to 'y'
or 'm', NULL otherwise. The (ptr) argument must be a pointer.

The IF_ENABLED() macro can be very useful to help GCC drop dead code.

For instance, consider the following:

    #ifdef CONFIG_FOO_SUSPEND
    static int foo_suspend(struct device *dev)
    {
       ...
    }
    #endif

    static struct pm_ops foo_ops = {
#ifdef CONFIG_FOO_SUSPEND
        .suspend = foo_suspend,
#endif
    };

While this works, the foo_suspend() macro is compiled conditionally,
only when CONFIG_FOO_SUSPEND is set. This is problematic, as there could
be a build bug in this function, we wouldn't have a way to know unless
the config option is set.

An alternative is to declare foo_suspend() always, but mark it as maybe
unused:

    static int __maybe_unused foo_suspend(struct device *dev)
    {
       ...
    }

    static struct pm_ops foo_ops = {
#ifdef CONFIG_FOO_SUSPEND
        .suspend = foo_suspend,
#endif
    };

Again, this works, but the __maybe_unused attribute is required to
instruct the compiler that the function may not be referenced anywhere,
and is safe to remove without making a fuss about it. This makes the
programmer responsible for tagging the functions that can be
garbage-collected.

With this patch, it is now possible to write the following:

    static int foo_suspend(struct device *dev)
    {
       ...
    }

    static struct pm_ops foo_ops = {
        .suspend = IF_ENABLED(CONFIG_FOO_SUSPEND, foo_suspend),
    };

The foo_suspend() function will now be automatically dropped by the
compiler, and it does not require any specific attribute.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20201213235447.138271-1-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Merge tag 'renesas-pinctrl-for-v5.12-tag1' of git://git./linux/kernel/git/geert/renesas-drivers into devel

pinctrl: renesas: Updates for v5.12

  - Restrict debug runtime-checks to Renesas platforms,
  - Initial support for the R-Car V3U SoC.

pinctrl: sprd: Simplify bool comparison

Fix the following coccicheck warning:
./drivers/pinctrl/sprd/pinctrl-sprd.c:690:8-23: WARNING: Comparison to
bool

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: YANG LI <abaci-bugfix@linux.alibaba.com>
Reviewed-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/1610440080-68600-1-git-send-email-abaci-bugfix@linux.alibaba.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ti :iodelay: Fixed inconsistent indenting

Kernel test robot throws below warning ->

smatch warnings:
drivers/pinctrl/ti/pinctrl-ti-iodelay.c:708
ti_iodelay_pinconf_group_dbg_show() warn: inconsistent indenting

Fixed the inconsistent indenting.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Link: https://lore.kernel.org/r/1610394585-4296-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: renesas: r8a779a0: Add TPU pins, groups and functions

Add pins, groups and functions for the 16-Bit Timer Pulse Unit outputs
on the R-Car R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-13-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add TMU pins, groups and functions

This patch adds TMU TCLK1-4 pins, groups and functions to the R8A779A0
(V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-12-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add QSPI pins, groups, and functions

Add the QSPI0-1 pins, groups and functions to the R8A779A0 (V3U) PFC
driver.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-11-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add PWM pins, groups and functions

This patch adds PWM0-4 pins, groups and functions to the R8A779A0 (V3U)
SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-10-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add MSIOF pins, groups and functions

This patch adds MSIOF0-5 pins, groups and functions to R8A779A0 (V3U)
SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-9-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add MMC pins, groups and functions

This patch adds MMC pins, groups and functions to R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165929.31002-8-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add INTC-EX pins, groups and function

Add pins, groups, and function for the Interrupt Controller for External
Devices (INTC-EX) on the R-Car R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-7-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add HSCIF pins, groups and functions

This patch adds HSCIF0-3 pins, groups and functions to the R8A779A0
(V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165929.31002-6-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add DU pins, groups and function

This patch adds DU pins, groups and function for the R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-5-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add CANFD pins, groups and functions

This patch adds CANFD 0-7 and CANFD clock pinmux support for the
R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-4-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add EtherAVB pins, groups and functions

This patch adds groups and function for AVB PHY, LINK, MAGIC, RGMII and
PTP pins for the R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165929.31002-3-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add I2C pins, groups and functions

This patch adds I2C0-6 pins, groups and functions to the R8A779A0 (V3U)
SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165929.31002-2-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: r8a779a0: Add SCIF pins, groups and functions

This patch adds SCIF0, 1, 3 and 4 pins, groups and functions for the
R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-6-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: Initial R8A779A0 (V3U) PFC support

This patch adds initial pinctrl support for the R8A779A0 (V3U) SoC,
including bias, drive strength and voltage control.

Based on patch by LUU HOAI <hoai.luu.ub@renesas.com>.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-5-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: Add PORT_GP_CFG_{2,31} macros

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-4-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: Add I/O voltage level flag

This patch adds config macros describing the voltage levels available on
a pin. The current default (3.3V/1.8V) maps to zero to avoid having to
change existing PFC implementations.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-3-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: Implement unlock register masks

The V3U SoC has several unlock registers, one per register group. They
reside at offset zero in each 0x200 bytes-sized block.

To avoid adding yet another table to the PFC implementation, this
patch adds the option to specify an address mask instead of the fixed
address in sh_pfc_soc_info::unlock_reg.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-2-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

dt-bindings: pinctrl: renesas,pfc: Document r8a779a0 PFC support

Document PFC support for the R-Car V3U (R8A779A0) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165912.30876-7-uli+renesas@fpond.eu
[geert: increase reg maxItems to 10]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

pinctrl: renesas: checker: Restrict checks to Renesas platforms

When DEBUG is defined (e.g. if CONFIG_DEBUG_PINCTRL=y), the Renesas pin
control driver runs sanity checks against the pin control tables.  This
may cause lots of output on the console, and can be annoying in ARM
multi-platform kernels.  Fix this by only running the checks when
running on SuperH, or on a DT platform supported by the Renesas pin
controller driver.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210111165013.496897-1-geert+renesas@glider.be

pinctrl: tigerlake: Add Alder Lake-P ACPI ID

Intel Alder Lake-P PCH has the same GPIO hardware than Tiger Lake-LP
PCH but the ACPI ID is different. Add this new ACPI ID to the list of
supported devices.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

pinctrl: intel: Convert capability list to features

Communities can have features provided in the capability list.
Traverse the list and convert to respective features.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

pinctrl: intel: Drop unnecessary check for predefined features

None of the drivers is overriding features. Remove unnecessary check.
While here, rename rev to value to make easier further development.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

pinctrl: intel: Split intel_pinctrl_add_padgroups() for better maintenance

Currently the intel_pinctrl_add_padgroups() is twisted a bit due to
a different nature of the pin control hardware implementations. Thus,
its maintenance is a bit hard. Besides that some pieces of code
are run on all hardware and make this code slightly inefficient,
and moreover, validation for one case is done in a wrong time in a flow
which makes it even slower.

Split intel_pinctrl_add_padgroups() to two functions, one per hardware
implementation, for better maintenance and readability.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>

pinctrl: sunxi: h6-r: Add s_rsb pin functions

As there is an RSB controller in the H6 SoC, there should be some pin
configuration for it. While no such configuration is documented, the
"s_i2c" pins are suspiciously on the "alternate" function 3, with no
primary function 2 given. This suggests the primary function for these
pins is actually RSB, and that is indeed the case.

Add the "s_rsb" pin functions so the RSB controller can be used.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20210103100007.32867-3-samuel@sholland.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: remove empty lines in pinctrl subsystem

Remove all empty lines at the end of functions in pinctrl subsystem,
and make the code neat.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Zhaoyu Liu <zackaryliu@yeah.net>
Link: https://lore.kernel.org/r/X98NP6NFK1Afzrgd@manjaro
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: fix '-Wmissing-prototypes' in init function

Kernel test robot reported the following warning:
'warning: no previous prototype for 'rt2880_pinmux_init''.
This function is the entry point for the platform driver and
it is private to this driver. Hence declare it 'static' which is
the correct thing to do fixing also this warning.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20201228064727.30098-1-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: use 'PTR_ERR_OR_ZERO'

 Avoid some boilerplate code using 'PTR_ERR_OR_ZERO'
 in probe function.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-8-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: preserve error codes

Some paths in probe function are returning '-EINVAL'
instead of preserve original code from called functions.
Change them to preserve all of them.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-7-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: delete not needed error message

When '-ENOMEM' is returned there is not need at all to
add custom error messages. Hence delete it.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-6-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: add missing NULL check

Memory is being requested to the kernel but there is
a missing check for NULL. Hence, add it.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-5-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: return proper error code

Check for NULL shall return '-ENOMEM' instead of '-1'.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-4-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ralink: rt2880: avoid double pointer to simplify code

Double pointer is being used and assigned in a bit dirty way to
assign functions in pinctrl. Instead of doing this just avoid it
and use directly 'p->func' instead.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-3-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

dt-bindings: pinctrl: rt2880: properly redo bindings

When this bindings where applied there weren't already
reviewed and some old hacks was being used to properly
pass the schemas checks. This commits fix them up:
 - Instead of using 'if-then' clause use '-pins$'.
 - 'groups' and 'function' are included inside a new
   '^(.*-)?pinmux$' node.
 - compatible string is not an 'enum' but a 'const'.
 - 'pinctrl-0' and 'pinctrl-names' removed since they are
    used in consumer nodes.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20201213161721.6514-2-sergio.paracuellos@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: ti-iodelay: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201211084902.2480-1-zhengyongjun3@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: mediatek: moore: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201211084801.2425-1-zhengyongjun3@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: mediatek: paris: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201211084717.2371-1-zhengyongjun3@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: at91: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20201211084541.2318-1-zhengyongjun3@huawei.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Linux 5.11-rc2

Merge tag 's390-5.11-3' of git://git./linux/kernel/git/s390/linux

Pull s390 cleanups from Vasily Gorbik:
 "Update defconfigs and sort config select list"

* tag 's390-5.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/Kconfig: sort config S390 select list once again
  s390: update defconfigs

Merge tag 'pm-5.11-rc2' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These fix a crash in intel_pstate during resume from suspend-to-RAM
  that may occur after recent changes and two resource leaks in error
  paths in the operating performance points (OPP) framework, add a new
  C-states table to intel_idle and update the cpuidle MAINTAINERS entry
  to cover the governors too.

  Specifics:

   - Fix recently introduced crash in the intel_pstate driver that
     occurs if scale-invariance is disabled during resume from
     suspend-to-RAM due to inconsistent changes of APERF or MPERF MSR
     values made by the platform firmware (Rafael Wysocki).

   - Fix a memory leak and add a missing clk_put() in error paths in the
     OPP framework (Quanyang Wang, Viresh Kumar).

   - Add new C-states table for SnowRidge processors to the intel_idle
     driver (Artem Bityutskiy).

   - Update the MAINTAINERS entry for cpuidle to make it clear that the
     governors are covered by it too (Lukas Bulwahn)"

* tag 'pm-5.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  intel_idle: add SnowRidge C-state table
  cpufreq: intel_pstate: Fix fast-switch fallback path
  opp: Call the missing clk_put() on error
  opp: fix memory leak in _allocate_opp_table
  MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORK

Merge branches 'pm-cpufreq' and 'pm-cpuidle'

* pm-cpufreq:
  cpufreq: intel_pstate: Fix fast-switch fallback path

* pm-cpuidle:
  intel_idle: add SnowRidge C-state table
  MAINTAINERS: include governors into CPU IDLE TIME MANAGEMENT FRAMEWORK

Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "This is a load of driver fixes (12 ufs, 1 mpt3sas, 1 cxgbi).

  The big core two fixes are for power management ("block: Do not accept
  any requests while suspended" and "block: Fix a race in the runtime
  power management code") which finally sorts out the resume problems
  we've occasionally been having.

  To make the resume fix, there are seven necessary precursors which
  effectively renames REQ_PREEMPT to REQ_PM, so every "special" request
  in block is automatically a power management exempt one.

  All of the non-PM preempt cases are removed except for the one in the
  SCSI Parallel Interface (spi) domain validation which is a genuine
  case where we have to run requests at high priority to validate the
  bus so this becomes an autopm get/put protected request"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (22 commits)
  scsi: cxgb4i: Fix TLS dependency
  scsi: ufs: Un-inline ufshcd_vops_device_reset function
  scsi: ufs: Re-enable WriteBooster after device reset
  scsi: ufs-mediatek: Use correct path to fix compile error
  scsi: mpt3sas: Signedness bug in _base_get_diag_triggers()
  scsi: block: Do not accept any requests while suspended
  scsi: block: Remove RQF_PREEMPT and BLK_MQ_REQ_PREEMPT
  scsi: core: Only process PM requests if rpm_status != RPM_ACTIVE
  scsi: scsi_transport_spi: Set RQF_PM for domain validation commands
  scsi: ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT
  scsi: ide: Do not set the RQF_PREEMPT flag for sense requests
  scsi: block: Introduce BLK_MQ_REQ_PM
  scsi: block: Fix a race in the runtime power management code
  scsi: ufs-pci: Enable UFSHCD_CAP_RPM_AUTOSUSPEND for Intel controllers
  scsi: ufs-pci: Fix recovery from hibernate exit errors for Intel controllers
  scsi: ufs-pci: Ensure UFS device is in PowerDown mode for suspend-to-disk ->poweroff()
  scsi: ufs-pci: Fix restore from S4 for Intel controllers
  scsi: ufs-mediatek: Keep VCC always-on for specific devices
  scsi: ufs: Allow regulators being always-on
  scsi: ufs: Clear UAC for RPMB after ufshcd resets
  ...

Merge tag 'block-5.11-2021-01-01' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "Two minor block fixes from this last week that should go into 5.11:

   - Add missing NOWAIT debugfs definition (Andres)

   - Fix kerneldoc warning introduced this merge window (Randy)"

* tag 'block-5.11-2021-01-01' of git://git.kernel.dk/linux-block:
  block: add debugfs stanza for QUEUE_FLAG_NOWAIT
  fs: block_dev.c: fix kernel-doc warnings from struct block_device changes

Merge tag 'io_uring-5.11-2021-01-01' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "A few fixes that should go into 5.11, all marked for stable as well:

   - Fix issue around identity COW'ing and users that share a ring
     across processes

   - Fix a hang associated with unregistering fixed files (Pavel)

   - Move the 'process is exiting' cancelation a bit earlier, so
     task_works aren't affected by it (Pavel)"

* tag 'io_uring-5.11-2021-01-01' of git://git.kernel.dk/linux-block:
  kernel/io_uring: cancel io_uring before task works
  io_uring: fix io_sqe_files_unregister() hangs
  io_uring: add a helper for setting a ref node
  io_uring: don't assume mm is constant across submits

depmod: handle the case of /sbin/depmod without /sbin in PATH

Commit 436e980e2ed5 ("kbuild: don't hardcode depmod path") stopped
hard-coding the path of depmod, but in the process caused trouble for
distributions that had that /sbin location, but didn't have it in the
PATH (generally because /sbin is limited to the super-user path).

Work around it for now by just adding /sbin to the end of PATH in the
depmod.sh script.

Reported-and-tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/io_uring: cancel io_uring before task works

For cancelling io_uring requests it needs either to be able to run
currently enqueued task_works or having it shut down by that moment.
Otherwise io_uring_cancel_files() may be waiting for requests that won't
ever complete.

Go with the first way and do cancellations before setting PF_EXITING and
so before putting the task_work infrastructure into a transition state
where task_work_run() would better not be called.

Cc: stable@vger.kernel.org # 5.5+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring: fix io_sqe_files_unregister() hangs

io_sqe_files_unregister() uninterruptibly waits for enqueued ref nodes,
however requests keeping them may never complete, e.g. because of some
userspace dependency. Make sure it's interruptible otherwise it would
hang forever.

Cc: stable@vger.kernel.org # 5.6+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring: add a helper for setting a ref node

Setting a new reference node to a file data is not trivial, don't repeat
it, add and use a helper.

Cc: stable@vger.kernel.org # 5.6+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
 "A fix for an edge case in MClientRequest encoding and a couple of
  trivial fixups for the new msgr2 support"

* tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client:
  libceph: add __maybe_unused to DEFINE_MSGR2_FEATURE
  libceph: align session_key and con_secret to 16 bytes
  libceph: fix auth_signature buffer allocation in secure mode
  ceph: reencode gid_list when reconnecting

intel_idle: add SnowRidge C-state table

Add C-state table for the SnowRidge SoC which is found on Intel Jacobsville
platforms.

The following has been changed.

 1. C1E latency changed from 10us to 15us. It was measured using the
    open source "wult" tool (the "nic" method, 15us is the 99.99th
    percentile).

 2. C1E power break even changed from 20us to 25us, which may result
    in less C1E residency in some workloads.

 3. C6 latency changed from 50us to 130us. Measured the same way as C1E.

The C6 C-state is supported only by some SnowRidge revisions, so add a C-state
table commentary about this.

On SnowRidge, C6 support is enumerated via the usual mechanism: "mwait" leaf of
the "cpuid" instruction. The 'intel_idle' driver does check this leaf, so even
though C6 is present in the table, the driver will only use it if the CPU does
support it.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

cpufreq: intel_pstate: Fix fast-switch fallback path

When sugov_update_single_perf() falls back to the "frequency"
path due to the missing scale-invariance, it will call
cpufreq_driver_fast_switch() via sugov_fast_switch()
and the driver's ->fast_switch() callback will be invoked,
so it must not be NULL.

However, after commit a365ab6b9dfb ("cpufreq: intel_pstate: Implement
the ->adjust_perf() callback") intel_pstate sets ->fast_switch() to
NULL when it is going to use intel_cpufreq_adjust_perf(), which is a
mistake, because on x86 the scale-invariance may be turned off
dynamically, so modify it to retain the original ->adjust_perf()
callback pointer.

Fixes: a365ab6b9dfb ("cpufreq: intel_pstate: Implement the ->adjust_perf() callback")
Reported-by: Kenneth R. Crudup <kenny@panix.com>
Tested-by: Kenneth R. Crudup <kenny@panix.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Merge branch 'opp/linux-next' of git://git./linux/kernel/git/vireshk/pm

Pull operating performance points (OPP) framework fixes for 5.11-rc2
from Viresh Kumar:

"This contains two patches to fix freeing of resources in error paths."

* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  opp: Call the missing clk_put() on error
  opp: fix memory leak in _allocate_opp_table

s390/Kconfig: sort config S390 select list once again

...and add comments at the top and bottom.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

s390: update defconfigs

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

block: add debugfs stanza for QUEUE_FLAG_NOWAIT

This was missed in 021a24460dc2. Leads to the numeric value of
QUEUE_FLAG_NOWAIT (i.e. 29) showing up in
/sys/kernel/debug/block/*/state.

Fixes: 021a24460dc28e7412aecfae89f60e1847e685c0
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs: block_dev.c: fix kernel-doc warnings from struct block_device changes

Fix new kernel-doc warnings in fs/block_dev.c:

../fs/block_dev.c:1066: warning: Excess function parameter 'whole' description in 'bd_abort_claiming'
../fs/block_dev.c:1837: warning: Function parameter or member 'dev' not described in 'lookup_bdev'

Fixes: 4e7b5671c6a8 ("block: remove i_bdev")
Fixes: 37c3fc9abb25 ("block: simplify the block device claiming interface")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-fsdevel@vger.kernel.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "16 patches

  Subsystems affected by this patch series: mm (selftests, hugetlb,
  pagecache, mremap, kasan, and slub), kbuild, checkpatch, misc, and
  lib"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: slub: call account_slab_page() after slab page initialization
  zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c
  lib/zlib: fix inflating zlib streams on s390
  lib/genalloc: fix the overflow when size is too big
  kdev_t: always inline major/minor helper functions
  sizes.h: add SZ_8G/SZ_16G/SZ_32G macros
  local64.h: make <asm/local64.h> mandatory
  kasan: fix null pointer dereference in kasan_record_aux_stack
  mm: generalise COW SMC TLB flushing race comment
  mm/mremap.c: fix extent calculation
  mm: memmap defer init doesn't work as expected
  mm: add prototype for __add_to_page_cache_locked()
  checkpatch: prefer strscpy to strlcpy
  Revert "kbuild: avoid static_assert for genksyms"
  mm/hugetlb: fix deadlock in hugetlb_cow error path
  selftests/vm: fix building protection keys test

mm: slub: call account_slab_page() after slab page initialization

It's convenient to have page->objects initialized before calling into
account_slab_page().  In particular, this information can be used to
pre-alloc the obj_cgroup vector.

Let's call account_slab_page() a bit later, after the initialization of
page->objects.

This commit doesn't bring any functional change, but is required for
further optimizations.

[akpm@linux-foundation.org: undo changes needed by forthcoming mm-memcg-slab-pre-allocate-obj_cgroups-for-slab-caches-with-slab_account.patch]

Link: https://lkml.kernel.org/r/20201110195753.530157-1-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

zlib: move EXPORT_SYMBOL() and MODULE_LICENSE() out of dfltcc_syms.c

In commit 11fb479ff5d9 ("zlib: export S390 symbols for zlib modules"), I
added EXPORT_SYMBOL()s to dfltcc_inflate.c but then Mikhail said that
these should probably be in dfltcc_syms.c with the other
EXPORT_SYMBOL()s.

However, that is contrary to the current kernel style, which places
EXPORT_SYMBOL() immediately after the function that it applies to, so
move all EXPORT_SYMBOL()s to their respective function locations and
drop the dfltcc_syms.c file.  Also move MODULE_LICENSE() from the
deleted file to dfltcc.c.

[rdunlap@infradead.org: remove dfltcc_syms.o from Makefile]
Link: https://lkml.kernel.org/r/20201227171837.15492-1-rdunlap@infradead.org
Link: https://lkml.kernel.org/r/20201219052530.28461-1-rdunlap@infradead.org
Fixes: 11fb479ff5d9 ("zlib: export S390 symbols for zlib modules")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Zaslonko Mikhail <zaslonko@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/zlib: fix inflating zlib streams on s390

Decompressing zlib streams on s390 fails with "incorrect data check"
error.

Userspace zlib checks inflate_state.flags in order to byteswap checksums
only for zlib streams, and s390 hardware inflate code, which was ported
from there, tries to match this behavior.  At the same time, kernel zlib
does not use inflate_state.flags, so it contains essentially random
values.  For many use cases either zlib stream is zeroed out or checksum
is not used, so this problem is masked, but at least SquashFS is still
affected.

Fix by always passing a checksum to and from the hardware as is, which
matches zlib_inflate()'s expectations.

Link: https://lkml.kernel.org/r/20201215155551.894884-1-iii@linux.ibm.com
Fixes: 126196100063 ("lib/zlib: add s390 hardware support for kernel zlib_inflate")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Cc: <stable@vger.kernel.org> [5.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/genalloc: fix the overflow when size is too big

Some graphic card has very big memory on chip, such as 32G bytes.

In the following case, it will cause overflow:

    pool = gen_pool_create(PAGE_SHIFT, NUMA_NO_NODE);
    ret = gen_pool_add(pool, 0x1000000, SZ_32G, NUMA_NO_NODE);

    va = gen_pool_alloc(pool, SZ_4G);

The overflow occurs in gen_pool_alloc_algo_owner():

....
size = nbits << order;
....

The @nbits is "int" type, so it will overflow.
Then the gen_pool_avail() will return the wrong value.

This patch converts some "int" to "unsigned long", and
changes the compare code in while.

Link: https://lkml.kernel.org/r/20201229060657.3389-1-sjhuang@iluvatar.ai
Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai>
Reported-by: Shi Jiasheng <jiasheng.shi@iluvatar.ai>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kdev_t: always inline major/minor helper functions

Silly GCC doesn't always inline these trivial functions.

Fixes the following warning:

  arch/x86/kernel/sys_ia32.o: warning: objtool: cp_stat64()+0xd8: call to new_encode_dev() with UACCESS enabled

Link: https://lkml.kernel.org/r/984353b44a4484d86ba9f73884b7306232e25e30.1608737428.git.jpoimboe@redhat.com
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> [build-tested]
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

sizes.h: add SZ_8G/SZ_16G/SZ_32G macros

Add these macros, since we can use them in drivers.

Link: https://lkml.kernel.org/r/20201229072819.11183-1-sjhuang@iluvatar.ai
Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

local64.h: make <asm/local64.h> mandatory

Make <asm-generic/local64.h> mandatory in include/asm-generic/Kbuild and
remove all arch/*/include/asm/local64.h arch-specific files since they
only #include <asm-generic/local64.h>.

This fixes build errors on arch/c6x/ and arch/nios2/ for
block/blk-iocost.c.

Build-tested on 21 of 25 arch-es.  (tools problems on the others)

Yes, we could even rename <asm-generic/local64.h> to
<linux/local64.h> and change all #includes to use
<linux/local64.h> instead.

Link: https://lkml.kernel.org/r/20201227024446.17018-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kasan: fix null pointer dereference in kasan_record_aux_stack

Syzbot reported the following [1]:

  BUG: kernel NULL pointer dereference, address: 0000000000000008
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 2d993067 P4D 2d993067 PUD 19a3c067 PMD 0
  Oops: 0000 [#1] PREEMPT SMP KASAN
  CPU: 1 PID: 3852 Comm: kworker/1:2 Not tainted 5.10.0-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  Workqueue: events free_ipc
  RIP: 0010:kasan_record_aux_stack+0x77/0xb0

Add null checking slab object from kasan_get_alloc_meta() in order to
avoid null pointer dereference.

[1] https://syzkaller.appspot.com/x/log.txt?x=10a82a50d00000

Link: https://lkml.kernel.org/r/20201228080018.23041-1-walter-zh.wu@mediatek.com
Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: generalise COW SMC TLB flushing race comment

I'm not sure if I'm completely missing something here, but AFAIKS the
reference to the mysterious "COW SMC race" confuses the issue.  The
original changelog and mailing list thread didn't help me either.

This SMC race is where the problem was detected, but isn't the general
problem bigger and more obvious: that the new PTE could be picked up at
any time by any TLB while entries for the old PTE exist in other TLBs
before the TLB flush takes effect?

The case where the iTLB and dTLB of a CPU are pointing at different pages
is an interesting one but follows from the general problem.

The other (minor) thing with the comment I think it makes it a bit clearer
to say what the old code was doing (i.e., it avoids the race as opposed to
what?).

References: 4ce072f1faf29 ("mm: fix a race condition under SMC + COW")
Link: https://lkml.kernel.org/r/20201215121119.351650-1-npiggin@gmail.com
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Hugh Dickins <hughd@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/mremap.c: fix extent calculation

When `next < old_addr`, `next - old_addr` arithmetic underflows causing
`extent` to be incorrect.

Make `extent` the smaller of `next - old_addr` or `old_end - old_addr`.

Link: https://lkml.kernel.org/r/20201219170433.2418867-1-kaleshsingh@google.com
Fixes: c49dd34018026 ("mm: speedup mremap on 1GB or larger regions")
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Kalesh Singh <kaleshsingh@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: memmap defer init doesn't work as expected

VMware observed a performance regression during memmap init on their
platform, and bisected to commit 73a6e474cb376 ("mm: memmap_init:
iterate over memblock regions rather that check each PFN") causing it.

Before the commit:

  [0.033176] Normal zone: 1445888 pages used for memmap
  [0.033176] Normal zone: 89391104 pages, LIFO batch:63
  [0.035851] ACPI: PM-Timer IO Port: 0x448

With commit

  [0.026874] Normal zone: 1445888 pages used for memmap
  [0.026875] Normal zone: 89391104 pages, LIFO batch:63
  [2.028450] ACPI: PM-Timer IO Port: 0x448

The root cause is the current memmap defer init doesn't work as expected.

Before, memmap_init_zone() was used to do memmap init of one whole zone,
to initialize all low zones of one numa node, but defer memmap init of
the last zone in that numa node.  However, since commit 73a6e474cb376,
function memmap_init() is adapted to iterater over memblock regions
inside one zone, then call memmap_init_zone() to do memmap init for each
region.

E.g, on VMware's system, the memory layout is as below, there are two
memory regions in node 2.  The current code will mistakenly initialize the
whole 1st region [mem 0xab00000000-0xfcffffffff], then do memmap defer to
iniatialize only one memmory section on the 2nd region [mem
0x10000000000-0x1033fffffff].  In fact, we only expect to see that there's
only one memory section's memmap initialized.  That's why more time is
costed at the time.

[    0.008842] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[    0.008842] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[    0.008843] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x55ffffffff]
[    0.008844] ACPI: SRAT: Node 1 PXM 1 [mem 0x5600000000-0xaaffffffff]
[    0.008844] ACPI: SRAT: Node 2 PXM 2 [mem 0xab00000000-0xfcffffffff]
[    0.008845] ACPI: SRAT: Node 2 PXM 2 [mem 0x10000000000-0x1033fffffff]

Now, let's add a parameter 'zone_end_pfn' to memmap_init_zone() to pass
down the real zone end pfn so that defer_init() can use it to judge
whether defer need be taken in zone wide.

Link: https://lkml.kernel.org/r/20201223080811.16211-1-bhe@redhat.com
Link: https://lkml.kernel.org/r/20201223080811.16211-2-bhe@redhat.com
Fixes: commit 73a6e474cb376 ("mm: memmap_init: iterate over memblock regions rather that check each PFN")
Signed-off-by: Baoquan He <bhe@redhat.com>
Reported-by: Rahul Gopakumar <gopakumarr@vmware.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: add prototype for __add_to_page_cache_locked()

Otherwise it causes a gcc warning:

  mm/filemap.c:830:14: warning: no previous prototype for `__add_to_page_cache_locked' [-Wmissing-prototypes]

A previous attempt to make this function static led to compilation
errors when CONFIG_DEBUG_INFO_BTF is enabled because
__add_to_page_cache_locked() is referred to by BPF code.

Adding a prototype will silence the warning.

Link: https://lkml.kernel.org/r/1608693702-4665-1-git-send-email-jrdr.linux@gmail.com
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

checkpatch: prefer strscpy to strlcpy

Prefer strscpy over the deprecated strlcpy function.

Link: https://lkml.kernel.org/r/19fe91084890e2c16fe56f960de6c570a93fa99b.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Revert "kbuild: avoid static_assert for genksyms"

This reverts commit 14dc3983b5dff513a90bd5a8cc90acaf7867c3d0.

Macro Elver had sent a fix proper fix earlier, and also pointed out
corner cases:
 "I guess what you propose is simpler, but might still have corner cases
  where we still get warnings. In particular, if some file (for whatever
  reason) does not include build_bug.h and uses a raw _Static_assert(),
  then we still get warnings. E.g. I see 1 user of raw _Static_assert()
  (drivers/gpu/drm/amd/amdgpu/amdgv_sriovmsg.h )."

I believe the raw use of _Static_assert() should be allowed, so this
should be fixed in genksyms.

Even after commit 14dc3983b5df ("kbuild: avoid static_assert for
genksyms"), I confirmed the following test code emits the warning.

  ---------------->8----------------
  #include <linux/export.h>

  _Static_assert((1 ?: 0), "");

  void foo(void) { }
  EXPORT_SYMBOL(foo);
  ---------------->8----------------

  WARNING: modpost: EXPORT symbol "foo" [vmlinux] version generation failed, symbol will not be versioned.

Now that commit 869b91992bce ("genksyms: Ignore module scoped
_Static_assert()") fixed this issue properly, the workaround should
be reverted.

Link: https://lkml.org/lkml/2020/12/10/845
Link: https://lkml.kernel.org/r/20201219183911.181442-1-masahiroy@kernel.org
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/hugetlb: fix deadlock in hugetlb_cow error path

syzbot reported the deadlock here [1].  The issue is in hugetlb cow
error handling when there are not enough huge pages for the faulting
task which took the original reservation.  It is possible that other
(child) tasks could have consumed pages associated with the reservation.
In this case, we want the task which took the original reservation to
succeed.  So, we unmap any associated pages in children so that they can
be used by the faulting task that owns the reservation.

The unmapping code needs to hold i_mmap_rwsem in write mode.  However,
due to commit c0d0381ade79 ("hugetlbfs: use i_mmap_rwsem for more pmd
sharing synchronization") we are already holding i_mmap_rwsem in read
mode when hugetlb_cow is called.

Technically, i_mmap_rwsem does not need to be held in read mode for COW
mappings as they can not share pmd's.  Modifying the fault code to not
take i_mmap_rwsem in read mode for COW (and other non-sharable) mappings
is too involved for a stable fix.

Instead, we simply drop the hugetlb_fault_mutex and i_mmap_rwsem before
unmapping.  This is OK as it is technically not needed.  They are
reacquired after unmapping as expected by calling code.  Since this is
done in an uncommon error path, the overhead of dropping and reacquiring
mutexes is acceptable.

While making changes, remove redundant BUG_ON after unmap_ref_private.

[1] https://lkml.kernel.org/r/000000000000b73ccc05b5cf8558@google.com

Link: https://lkml.kernel.org/r/4c5781b8-3b00-761e-c0c7-c5edebb6ec1a@oracle.com
Fixes: c0d0381ade79 ("hugetlbfs: use i_mmap_rwsem for more pmd sharing synchronization")
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: syzbot+5eee4145df3c15e96625@syzkaller.appspotmail.com
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

selftests/vm: fix building protection keys test

Commit d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error") tried
to include a ARCH check for powerpc, however ARCH is not defined in the
Makefile before including lib.mk.  This makes test building to skip on
both x86 and powerpc.

Fix the arch check by replacing it using machine type as it is already
defined and used in the test.

Link: https://lkml.kernel.org/r/20201215100402.257376-1-harish@linux.ibm.com
Fixes: d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error")
Signed-off-by: Harish <harish@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>