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| author | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-28 11:50:24 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-29 13:23:01 -0800 |
| commit | d55c5a93db2d5fa95f233ab153f594365d95b777 (patch) | |
| tree | f589ea96fe3fab9c935c0963dab7ec8f8a7745fb /arch/x86/lib | |
| parent | eb068e781020cf491333c773fb41820b57bfada4 (diff) | |
| download | op-kernel-dev-d55c5a93db2d5fa95f233ab153f594365d95b777.zip op-kernel-dev-d55c5a93db2d5fa95f233ab153f594365d95b777.tar.gz | |
x86, 386 removal: Remove CONFIG_CMPXCHG
All 486+ CPUs support CMPXCHG, so remove the fallback 386 support
code.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1354132230-21854-3-git-send-email-hpa@linux.intel.com
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/lib/cmpxchg.c | 54 |
2 files changed, 0 insertions, 55 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index b00f678..96b2c66 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -32,7 +32,6 @@ ifeq ($(CONFIG_X86_32),y) lib-y += checksum_32.o lib-y += strstr_32.o lib-y += string_32.o - lib-y += cmpxchg.o ifneq ($(CONFIG_X86_CMPXCHG64),y) lib-y += cmpxchg8b_emu.o atomic64_386_32.o endif diff --git a/arch/x86/lib/cmpxchg.c b/arch/x86/lib/cmpxchg.c deleted file mode 100644 index 5d619f6d..0000000 --- a/arch/x86/lib/cmpxchg.c +++ /dev/null @@ -1,54 +0,0 @@ -/* - * cmpxchg*() fallbacks for CPU not supporting these instructions - */ - -#include <linux/kernel.h> -#include <linux/smp.h> -#include <linux/module.h> - -#ifndef CONFIG_X86_CMPXCHG -unsigned long cmpxchg_386_u8(volatile void *ptr, u8 old, u8 new) -{ - u8 prev; - unsigned long flags; - - /* Poor man's cmpxchg for 386. Unsuitable for SMP */ - local_irq_save(flags); - prev = *(u8 *)ptr; - if (prev == old) - *(u8 *)ptr = new; - local_irq_restore(flags); - return prev; -} -EXPORT_SYMBOL(cmpxchg_386_u8); - -unsigned long cmpxchg_386_u16(volatile void *ptr, u16 old, u16 new) -{ - u16 prev; - unsigned long flags; - - /* Poor man's cmpxchg for 386. Unsuitable for SMP */ - local_irq_save(flags); - prev = *(u16 *)ptr; - if (prev == old) - *(u16 *)ptr = new; - local_irq_restore(flags); - return prev; -} -EXPORT_SYMBOL(cmpxchg_386_u16); - -unsigned long cmpxchg_386_u32(volatile void *ptr, u32 old, u32 new) -{ - u32 prev; - unsigned long flags; - - /* Poor man's cmpxchg for 386. Unsuitable for SMP */ - local_irq_save(flags); - prev = *(u32 *)ptr; - if (prev == old) - *(u32 *)ptr = new; - local_irq_restore(flags); - return prev; -} -EXPORT_SYMBOL(cmpxchg_386_u32); -#endif |
