kernel: remove platform_has() infrastructure

The only use case of the platform_has() infrastructure has been
removed again, so remove the whole feature.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> # Arm64 guest using Xen
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20220622063838.8854-3-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/MAINTAINERS b/MAINTAINERS
index 64379c6..c173a58 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15953,14 +15953,6 @@ S:     Maintained
 F:     Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml
 F:     drivers/iio/chemical/pms7003.c
 
-PLATFORM FEATURE INFRASTRUCTURE
-M:     Juergen Gross <jgross@suse.com>
-S:     Maintained
-F:     arch/*/include/asm/platform-feature.h
-F:     include/asm-generic/platform-feature.h
-F:     include/linux/platform-feature.h
-F:     kernel/platform-feature.c
-
 PLDMFW LIBRARY
 M:     Jacob Keller <jacob.e.keller@intel.com>
 S:     Maintained

diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index 8e47d48..302506b 100644 (file)
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -44,7 +44,6 @@ mandatory-y += msi.h
 mandatory-y += pci.h
 mandatory-y += percpu.h
 mandatory-y += pgalloc.h
-mandatory-y += platform-feature.h
 mandatory-y += preempt.h
 mandatory-y += rwonce.h
 mandatory-y += sections.h

diff --git a/include/asm-generic/platform-feature.h b/include/asm-generic/platform-feature.h
deleted file mode 100644 (file)
index 4b0af3d..0000000
--- a/include/asm-generic/platform-feature.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_GENERIC_PLATFORM_FEATURE_H
-#define _ASM_GENERIC_PLATFORM_FEATURE_H
-
-/* Number of arch specific feature flags. */
-#define PLATFORM_ARCH_FEAT_N   0
-
-#endif /* _ASM_GENERIC_PLATFORM_FEATURE_H */

diff --git a/include/linux/platform-feature.h b/include/linux/platform-feature.h
deleted file mode 100644 (file)
index 6ed8599..0000000
--- a/include/linux/platform-feature.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _PLATFORM_FEATURE_H
-#define _PLATFORM_FEATURE_H
-
-#include <linux/bitops.h>
-#include <asm/platform-feature.h>
-
-/* The platform features are starting with the architecture specific ones. */
-#define PLATFORM_FEAT_N                                (0 + PLATFORM_ARCH_FEAT_N)
-
-void platform_set(unsigned int feature);
-void platform_clear(unsigned int feature);
-bool platform_has(unsigned int feature);
-
-#endif /* _PLATFORM_FEATURE_H */

diff --git a/kernel/Makefile b/kernel/Makefile
index a7e1f49..318789c 100644 (file)
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -7,7 +7,7 @@ obj-y     = fork.o exec_domain.o panic.o \
            cpu.o exit.o softirq.o resource.o \
            sysctl.o capability.o ptrace.o user.o \
            signal.o sys.o umh.o workqueue.o pid.o task_work.o \
-           extable.o params.o platform-feature.o \
+           extable.o params.o \
            kthread.o sys_ni.o nsproxy.o \
            notifier.o ksysfs.o cred.o reboot.o \
            async.o range.o smpboot.o ucount.o regset.o

diff --git a/kernel/platform-feature.c b/kernel/platform-feature.c
deleted file mode 100644 (file)
index cb6a6c3..0000000
--- a/kernel/platform-feature.c
+++ /dev/null
@@ -1,27 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-#include <linux/bitops.h>
-#include <linux/cache.h>
-#include <linux/export.h>
-#include <linux/platform-feature.h>
-
-#define PLATFORM_FEAT_ARRAY_SZ  BITS_TO_LONGS(PLATFORM_FEAT_N)
-static unsigned long __read_mostly platform_features[PLATFORM_FEAT_ARRAY_SZ];
-
-void platform_set(unsigned int feature)
-{
-       set_bit(feature, platform_features);
-}
-EXPORT_SYMBOL_GPL(platform_set);
-
-void platform_clear(unsigned int feature)
-{
-       clear_bit(feature, platform_features);
-}
-EXPORT_SYMBOL_GPL(platform_clear);
-
-bool platform_has(unsigned int feature)
-{
-       return test_bit(feature, platform_features);
-}
-EXPORT_SYMBOL_GPL(platform_has);