*
* Atomically decrements @v and calls <fail_fn> if the result is negative.
*/
-#define __mutex_fastpath_lock(v, fail_fn) \
-do { \
- unsigned long dummy; \
- \
- typecheck(atomic_t *, v); \
- typecheck_fn(void (*)(atomic_t *), fail_fn); \
- \
- __asm__ __volatile__( \
- LOCK_PREFIX " decl (%%rdi) \n" \
- " jns 1f \n" \
- " call "#fail_fn" \n" \
- "1:" \
- \
- :"=D" (dummy) \
- : "D" (v) \
- : "rax", "rsi", "rdx", "rcx", \
- "r8", "r9", "r10", "r11", "memory"); \
+#define __mutex_fastpath_lock(v, fail_fn) \
+do { \
+ unsigned long dummy; \
+ \
+ typecheck(atomic_t *, v); \
+ typecheck_fn(void (*)(atomic_t *), fail_fn); \
+ \
+ asm volatile(LOCK_PREFIX " decl (%%rdi)\n" \
+ " jns 1f \n" \
+ " call " #fail_fn "\n" \
+ "1:" \
+ : "=D" (dummy) \
+ : "D" (v) \
+ : "rax", "rsi", "rdx", "rcx", \
+ "r8", "r9", "r10", "r11", "memory"); \
} while (0)
/**
* it wasn't 1 originally. This function returns 0 if the fastpath succeeds,
* or anything the slow path function returns
*/
-static inline int
-__mutex_fastpath_lock_retval(atomic_t *count,
- int (*fail_fn)(atomic_t *))
+static inline int __mutex_fastpath_lock_retval(atomic_t *count,
+ int (*fail_fn)(atomic_t *))
{
if (unlikely(atomic_dec_return(count) < 0))
return fail_fn(count);
*
* Atomically increments @v and calls <fail_fn> if the result is nonpositive.
*/
-#define __mutex_fastpath_unlock(v, fail_fn) \
-do { \
- unsigned long dummy; \
- \
- typecheck(atomic_t *, v); \
- typecheck_fn(void (*)(atomic_t *), fail_fn); \
- \
- __asm__ __volatile__( \
- LOCK_PREFIX " incl (%%rdi) \n" \
- " jg 1f \n" \
- " call "#fail_fn" \n" \
- "1: " \
- \
- :"=D" (dummy) \
- : "D" (v) \
- : "rax", "rsi", "rdx", "rcx", \
- "r8", "r9", "r10", "r11", "memory"); \
+#define __mutex_fastpath_unlock(v, fail_fn) \
+do { \
+ unsigned long dummy; \
+ \
+ typecheck(atomic_t *, v); \
+ typecheck_fn(void (*)(atomic_t *), fail_fn); \
+ \
+ asm volatile(LOCK_PREFIX " incl (%%rdi)\n" \
+ " jg 1f\n" \
+ " call " #fail_fn "\n" \
+ "1:" \
+ : "=D" (dummy) \
+ : "D" (v) \
+ : "rax", "rsi", "rdx", "rcx", \
+ "r8", "r9", "r10", "r11", "memory"); \
} while (0)
#define __mutex_slowpath_needs_to_unlock() 1
* if it wasn't 1 originally. [the fallback function is never used on
* x86_64, because all x86_64 CPUs have a CMPXCHG instruction.]
*/
-static inline int
-__mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
+static inline int __mutex_fastpath_trylock(atomic_t *count,
+ int (*fail_fn)(atomic_t *))
{
if (likely(atomic_cmpxchg(count, 1, 0) == 1))
return 1;