diff options
Diffstat (limited to 'arch/sparc/include/asm/cmpxchg_32.h')
| -rw-r--r-- | arch/sparc/include/asm/cmpxchg_32.h | 33 |
1 files changed, 3 insertions, 30 deletions
diff --git a/arch/sparc/include/asm/cmpxchg_32.h b/arch/sparc/include/asm/cmpxchg_32.h index c786b0a92b5..32c29a133f9 100644 --- a/arch/sparc/include/asm/cmpxchg_32.h +++ b/arch/sparc/include/asm/cmpxchg_32.h @@ -11,43 +11,16 @@ #ifndef __ARCH_SPARC_CMPXCHG__ #define __ARCH_SPARC_CMPXCHG__ -#include <asm/btfixup.h> - -/* This has special calling conventions */ -#ifndef CONFIG_SMP -BTFIXUPDEF_CALL(void, ___xchg32, void) -#endif - static inline unsigned long xchg_u32(__volatile__ unsigned long *m, unsigned long val) { -#ifdef CONFIG_SMP __asm__ __volatile__("swap [%2], %0" : "=&r" (val) : "0" (val), "r" (m) : "memory"); return val; -#else - register unsigned long *ptr asm("g1"); - register unsigned long ret asm("g2"); - - ptr = (unsigned long *) m; - ret = val; - - /* Note: this is magic and the nop there is - really needed. */ - __asm__ __volatile__( - "mov %%o7, %%g4\n\t" - "call ___f____xchg32\n\t" - " nop\n\t" - : "=&r" (ret) - : "0" (ret), "r" (ptr) - : "g3", "g4", "g7", "memory", "cc"); - - return ret; -#endif } -extern void __xchg_called_with_bad_pointer(void); +void __xchg_called_with_bad_pointer(void); static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, int size) { @@ -72,9 +45,9 @@ static inline unsigned long __xchg(unsigned long x, __volatile__ void * ptr, int #define __HAVE_ARCH_CMPXCHG 1 /* bug catcher for when unsupported size is used - won't link */ -extern void __cmpxchg_called_with_bad_pointer(void); +void __cmpxchg_called_with_bad_pointer(void); /* we only need to support cmpxchg of a u32 on sparc */ -extern unsigned long __cmpxchg_u32(volatile u32 *m, u32 old, u32 new_); +unsigned long __cmpxchg_u32(volatile u32 *m, u32 old, u32 new_); /* don't worry...optimizer will get rid of most of this */ static inline unsigned long |