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Commit fac99d97 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Fixup __raw_read_trylock(). 



generic__raw_read_trylock() was broken, fix up the __raw_read_trylock()
implementation for something sensible. Taken from m32r, which has the
same use cases.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 2914d4da

include/asm-sh/spinlock.h

+8 −1
Original line number Original line Diff line number Diff line
@@ -88,7 +88,14 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw) 
	__raw_spin_unlock(&rw->lock);

	__raw_spin_unlock(&rw->lock);

}

}





#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)

static inline int __raw_read_trylock(raw_rwlock_t *lock)

{

	atomic_t *count = (atomic_t*)lock;

	if (atomic_dec_return(count) >= 0)

		return 1;

	atomic_inc(count);

	return 0;

}





static inline int __raw_write_trylock(raw_rwlock_t *rw)

static inline int __raw_write_trylock(raw_rwlock_t *rw)

{

{