diff options
Diffstat (limited to 'arch/x86/include/asm/cmpxchg_64.h')
| -rw-r--r-- | arch/x86/include/asm/cmpxchg_64.h | 92 |
1 files changed, 48 insertions, 44 deletions
diff --git a/arch/x86/include/asm/cmpxchg_64.h b/arch/x86/include/asm/cmpxchg_64.h index 52de72e0de8c..e8cb051b8681 100644 --- a/arch/x86/include/asm/cmpxchg_64.h +++ b/arch/x86/include/asm/cmpxchg_64.h @@ -8,13 +8,11 @@ #define __xg(x) ((volatile long *)(x)) -static inline void set_64bit(volatile unsigned long *ptr, unsigned long val) +static inline void set_64bit(volatile u64 *ptr, u64 val) { *ptr = val; } -#define _set_64bit set_64bit - /* * Note: no "lock" prefix even on SMP: xchg always implies lock anyway * Note 2: xchg has side effect, so that attribute volatile is necessary, @@ -26,26 +24,26 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, switch (size) { case 1: asm volatile("xchgb %b0,%1" - : "=q" (x) - : "m" (*__xg(ptr)), "0" (x) + : "=q" (x), "+m" (*__xg(ptr)) + : "0" (x) : "memory"); break; case 2: asm volatile("xchgw %w0,%1" - : "=r" (x) - : "m" (*__xg(ptr)), "0" (x) + : "=r" (x), "+m" (*__xg(ptr)) + : "0" (x) : "memory"); break; case 4: asm volatile("xchgl %k0,%1" - : "=r" (x) - : "m" (*__xg(ptr)), "0" (x) + : "=r" (x), "+m" (*__xg(ptr)) + : "0" (x) : "memory"); break; case 8: asm volatile("xchgq %0,%1" - : "=r" (x) - : "m" (*__xg(ptr)), "0" (x) + : "=r" (x), "+m" (*__xg(ptr)) + : "0" (x) : "memory"); break; } @@ -66,27 +64,27 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, unsigned long prev; switch (size) { case 1: - asm volatile(LOCK_PREFIX "cmpxchgb %b1,%2" - : "=a"(prev) - : "q"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile(LOCK_PREFIX "cmpxchgb %b2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "q"(new), "0"(old) : "memory"); return prev; case 2: - asm volatile(LOCK_PREFIX "cmpxchgw %w1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile(LOCK_PREFIX "cmpxchgw %w2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; case 4: - asm volatile(LOCK_PREFIX "cmpxchgl %k1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile(LOCK_PREFIX "cmpxchgl %k2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; case 8: - asm volatile(LOCK_PREFIX "cmpxchgq %1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile(LOCK_PREFIX "cmpxchgq %2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; } @@ -105,21 +103,27 @@ static inline unsigned long __sync_cmpxchg(volatile void *ptr, unsigned long prev; switch (size) { case 1: - asm volatile("lock; cmpxchgb %b1,%2" - : "=a"(prev) - : "q"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("lock; cmpxchgb %b2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "q"(new), "0"(old) : "memory"); return prev; case 2: - asm volatile("lock; cmpxchgw %w1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("lock; cmpxchgw %w2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; case 4: - asm volatile("lock; cmpxchgl %1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("lock; cmpxchgl %k2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) + : "memory"); + return prev; + case 8: + asm volatile("lock; cmpxchgq %2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; } @@ -133,27 +137,27 @@ static inline unsigned long __cmpxchg_local(volatile void *ptr, unsigned long prev; switch (size) { case 1: - asm volatile("cmpxchgb %b1,%2" - : "=a"(prev) - : "q"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("cmpxchgb %b2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "q"(new), "0"(old) : "memory"); return prev; case 2: - asm volatile("cmpxchgw %w1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("cmpxchgw %w2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; case 4: - asm volatile("cmpxchgl %k1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("cmpxchgl %k2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; case 8: - asm volatile("cmpxchgq %1,%2" - : "=a"(prev) - : "r"(new), "m"(*__xg(ptr)), "0"(old) + asm volatile("cmpxchgq %2,%1" + : "=a"(prev), "+m"(*__xg(ptr)) + : "r"(new), "0"(old) : "memory"); return prev; } |