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[MIPS] Replace generic__raw_read_trylock usage 

generic__raw_read_trylock() is a defect generic function actually doing
a __raw_read_lock ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2006-08-31 14:16:06 +01:00
parent 09f451bfb9
commit 65316fd13a
1 changed files with 46 additions and 1 deletions
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47
include/asm-mips/spinlock.h
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@ -239,7 +239,51 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw)
: "memory");
}
#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)
static inline int __raw_read_trylock(raw_rwlock_t *rw)
{
unsigned int tmp;
int ret;
if (R10000_LLSC_WAR) {
__asm__ __volatile__(
" .set noreorder # __raw_read_trylock \n"
" li %2, 0 \n"
"1: ll %1, %3 \n"
" bnez %1, 2f \n"
" addu %1, 1 \n"
" sc %1, %0 \n"
" beqzl %1, 1b \n"
" .set reorder \n"
#ifdef CONFIG_SMP
" sync \n"
#endif
" li %2, 1 \n"
"2: \n"
: "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
: "m" (rw->lock)
: "memory");
} else {
__asm__ __volatile__(
" .set noreorder # __raw_read_trylock \n"
" li %2, 0 \n"
"1: ll %1, %3 \n"
" bnez %1, 2f \n"
" addu %1, 1 \n"
" sc %1, %0 \n"
" beqz %1, 1b \n"
" .set reorder \n"
#ifdef CONFIG_SMP
" sync \n"
#endif
" li %2, 1 \n"
"2: \n"
: "=m" (rw->lock), "=&r" (tmp), "=&r" (ret)
: "m" (rw->lock)
: "memory");
}
return ret;
}
static inline int __raw_write_trylock(raw_rwlock_t *rw)
{
@ -283,4 +327,5 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
return ret;
}
#endif /* _ASM_SPINLOCK_H */