diff options
Diffstat (limited to 'arch/arm64/include/asm/cmpxchg.h')
| -rw-r--r-- | arch/arm64/include/asm/cmpxchg.h | 77 |
1 files changed, 40 insertions, 37 deletions
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h index e0e65b069d9e..8a8ce0e73a38 100644 --- a/arch/arm64/include/asm/cmpxchg.h +++ b/arch/arm64/include/asm/cmpxchg.h @@ -29,39 +29,39 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size switch (size) { case 1: asm volatile("// __xchg1\n" - "1: ldaxrb %w0, [%3]\n" - " stlxrb %w1, %w2, [%3]\n" + "1: ldaxrb %w0, %2\n" + " stlxrb %w1, %w3, %2\n" " cbnz %w1, 1b\n" - : "=&r" (ret), "=&r" (tmp) - : "r" (x), "r" (ptr) - : "memory", "cc"); + : "=&r" (ret), "=&r" (tmp), "+Q" (*(u8 *)ptr) + : "r" (x) + : "cc", "memory"); break; case 2: asm volatile("// __xchg2\n" - "1: ldaxrh %w0, [%3]\n" - " stlxrh %w1, %w2, [%3]\n" + "1: ldaxrh %w0, %2\n" + " stlxrh %w1, %w3, %2\n" " cbnz %w1, 1b\n" - : "=&r" (ret), "=&r" (tmp) - : "r" (x), "r" (ptr) - : "memory", "cc"); + : "=&r" (ret), "=&r" (tmp), "+Q" (*(u16 *)ptr) + : "r" (x) + : "cc", "memory"); break; case 4: asm volatile("// __xchg4\n" - "1: ldaxr %w0, [%3]\n" - " stlxr %w1, %w2, [%3]\n" + "1: ldaxr %w0, %2\n" + " stlxr %w1, %w3, %2\n" " cbnz %w1, 1b\n" - : "=&r" (ret), "=&r" (tmp) - : "r" (x), "r" (ptr) - : "memory", "cc"); + : "=&r" (ret), "=&r" (tmp), "+Q" (*(u32 *)ptr) + : "r" (x) + : "cc", "memory"); break; case 8: asm volatile("// __xchg8\n" - "1: ldaxr %0, [%3]\n" - " stlxr %w1, %2, [%3]\n" + "1: ldaxr %0, %2\n" + " stlxr %w1, %3, %2\n" " cbnz %w1, 1b\n" - : "=&r" (ret), "=&r" (tmp) - : "r" (x), "r" (ptr) - : "memory", "cc"); + : "=&r" (ret), "=&r" (tmp), "+Q" (*(u64 *)ptr) + : "r" (x) + : "cc", "memory"); break; default: BUILD_BUG(); @@ -82,14 +82,14 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, case 1: do { asm volatile("// __cmpxchg1\n" - " ldxrb %w1, [%2]\n" + " ldxrb %w1, %2\n" " mov %w0, #0\n" " cmp %w1, %w3\n" " b.ne 1f\n" - " stxrb %w0, %w4, [%2]\n" + " stxrb %w0, %w4, %2\n" "1:\n" - : "=&r" (res), "=&r" (oldval) - : "r" (ptr), "Ir" (old), "r" (new) + : "=&r" (res), "=&r" (oldval), "+Q" (*(u8 *)ptr) + : "Ir" (old), "r" (new) : "cc"); } while (res); break; @@ -97,29 +97,29 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, case 2: do { asm volatile("// __cmpxchg2\n" - " ldxrh %w1, [%2]\n" + " ldxrh %w1, %2\n" " mov %w0, #0\n" " cmp %w1, %w3\n" " b.ne 1f\n" - " stxrh %w0, %w4, [%2]\n" + " stxrh %w0, %w4, %2\n" "1:\n" - : "=&r" (res), "=&r" (oldval) - : "r" (ptr), "Ir" (old), "r" (new) - : "memory", "cc"); + : "=&r" (res), "=&r" (oldval), "+Q" (*(u16 *)ptr) + : "Ir" (old), "r" (new) + : "cc"); } while (res); break; case 4: do { asm volatile("// __cmpxchg4\n" - " ldxr %w1, [%2]\n" + " ldxr %w1, %2\n" " mov %w0, #0\n" " cmp %w1, %w3\n" " b.ne 1f\n" - " stxr %w0, %w4, [%2]\n" + " stxr %w0, %w4, %2\n" "1:\n" - : "=&r" (res), "=&r" (oldval) - : "r" (ptr), "Ir" (old), "r" (new) + : "=&r" (res), "=&r" (oldval), "+Q" (*(u32 *)ptr) + : "Ir" (old), "r" (new) : "cc"); } while (res); break; @@ -127,14 +127,14 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, case 8: do { asm volatile("// __cmpxchg8\n" - " ldxr %1, [%2]\n" + " ldxr %1, %2\n" " mov %w0, #0\n" " cmp %1, %3\n" " b.ne 1f\n" - " stxr %w0, %4, [%2]\n" + " stxr %w0, %4, %2\n" "1:\n" - : "=&r" (res), "=&r" (oldval) - : "r" (ptr), "Ir" (old), "r" (new) + : "=&r" (res), "=&r" (oldval), "+Q" (*(u64 *)ptr) + : "Ir" (old), "r" (new) : "cc"); } while (res); break; @@ -170,4 +170,7 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old, (unsigned long)(n), \ sizeof(*(ptr)))) +#define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n)) +#define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n)) + #endif /* __ASM_CMPXCHG_H */ |