diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-28 23:50:24 +0400 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-30 01:23:01 +0400 |
| commit | d55c5a93db2d5fa95f233ab153f594365d95b777 (patch) | |
| tree | f589ea96fe3fab9c935c0963dab7ec8f8a7745fb /arch/x86/include/asm/cmpxchg_32.h | |
| parent | eb068e781020cf491333c773fb41820b57bfada4 (diff) | |
| download | linux-d55c5a93db2d5fa95f233ab153f594365d95b777.tar.xz | |
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/include/asm/cmpxchg_32.h')
| -rw-r--r-- | arch/x86/include/asm/cmpxchg_32.h | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/arch/x86/include/asm/cmpxchg_32.h b/arch/x86/include/asm/cmpxchg_32.h index 53f4b219336b..f8bf2eecab86 100644 --- a/arch/x86/include/asm/cmpxchg_32.h +++ b/arch/x86/include/asm/cmpxchg_32.h @@ -34,9 +34,7 @@ static inline void set_64bit(volatile u64 *ptr, u64 value) : "memory"); } -#ifdef CONFIG_X86_CMPXCHG #define __HAVE_ARCH_CMPXCHG 1 -#endif #ifdef CONFIG_X86_CMPXCHG64 #define cmpxchg64(ptr, o, n) \ @@ -73,59 +71,6 @@ static inline u64 __cmpxchg64_local(volatile u64 *ptr, u64 old, u64 new) return prev; } -#ifndef CONFIG_X86_CMPXCHG -/* - * Building a kernel capable running on 80386. It may be necessary to - * simulate the cmpxchg on the 80386 CPU. For that purpose we define - * a function for each of the sizes we support. - */ - -extern unsigned long cmpxchg_386_u8(volatile void *, u8, u8); -extern unsigned long cmpxchg_386_u16(volatile void *, u16, u16); -extern unsigned long cmpxchg_386_u32(volatile void *, u32, u32); - -static inline unsigned long cmpxchg_386(volatile void *ptr, unsigned long old, - unsigned long new, int size) -{ - switch (size) { - case 1: - return cmpxchg_386_u8(ptr, old, new); - case 2: - return cmpxchg_386_u16(ptr, old, new); - case 4: - return cmpxchg_386_u32(ptr, old, new); - } - return old; -} - -#define cmpxchg(ptr, o, n) \ -({ \ - __typeof__(*(ptr)) __ret; \ - if (likely(boot_cpu_data.x86 > 3)) \ - __ret = (__typeof__(*(ptr)))__cmpxchg((ptr), \ - (unsigned long)(o), (unsigned long)(n), \ - sizeof(*(ptr))); \ - else \ - __ret = (__typeof__(*(ptr)))cmpxchg_386((ptr), \ - (unsigned long)(o), (unsigned long)(n), \ - sizeof(*(ptr))); \ - __ret; \ -}) -#define cmpxchg_local(ptr, o, n) \ -({ \ - __typeof__(*(ptr)) __ret; \ - if (likely(boot_cpu_data.x86 > 3)) \ - __ret = (__typeof__(*(ptr)))__cmpxchg_local((ptr), \ - (unsigned long)(o), (unsigned long)(n), \ - sizeof(*(ptr))); \ - else \ - __ret = (__typeof__(*(ptr)))cmpxchg_386((ptr), \ - (unsigned long)(o), (unsigned long)(n), \ - sizeof(*(ptr))); \ - __ret; \ -}) -#endif - #ifndef CONFIG_X86_CMPXCHG64 /* * Building a kernel capable running on 80386 and 80486. It may be necessary |