diff options
Diffstat (limited to 'include/asm-x86/spinlock.h')
| -rw-r--r-- | include/asm-x86/spinlock.h | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/include/asm-x86/spinlock.h b/include/asm-x86/spinlock.h index bc6376f1bc5a..21e89bf92f1c 100644 --- a/include/asm-x86/spinlock.h +++ b/include/asm-x86/spinlock.h @@ -20,18 +20,8 @@ */ #ifdef CONFIG_X86_32 -typedef char _slock_t; -# define LOCK_INS_DEC "decb" -# define LOCK_INS_XCH "xchgb" -# define LOCK_INS_MOV "movb" -# define LOCK_INS_CMP "cmpb" # define LOCK_PTR_REG "a" #else -typedef int _slock_t; -# define LOCK_INS_DEC "decl" -# define LOCK_INS_XCH "xchgl" -# define LOCK_INS_MOV "movl" -# define LOCK_INS_CMP "cmpl" # define LOCK_PTR_REG "D" #endif @@ -66,14 +56,14 @@ typedef int _slock_t; #if (NR_CPUS < 256) static inline int __raw_spin_is_locked(raw_spinlock_t *lock) { - int tmp = *(volatile signed int *)(&(lock)->slock); + int tmp = ACCESS_ONCE(lock->slock); return (((tmp >> 8) & 0xff) != (tmp & 0xff)); } static inline int __raw_spin_is_contended(raw_spinlock_t *lock) { - int tmp = *(volatile signed int *)(&(lock)->slock); + int tmp = ACCESS_ONCE(lock->slock); return (((tmp >> 8) & 0xff) - (tmp & 0xff)) > 1; } @@ -130,14 +120,14 @@ static __always_inline void __raw_spin_unlock(raw_spinlock_t *lock) #else static inline int __raw_spin_is_locked(raw_spinlock_t *lock) { - int tmp = *(volatile signed int *)(&(lock)->slock); + int tmp = ACCESS_ONCE(lock->slock); return (((tmp >> 16) & 0xffff) != (tmp & 0xffff)); } static inline int __raw_spin_is_contended(raw_spinlock_t *lock) { - int tmp = *(volatile signed int *)(&(lock)->slock); + int tmp = ACCESS_ONCE(lock->slock); return (((tmp >> 16) & 0xffff) - (tmp & 0xffff)) > 1; } |
