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Commit 85f65179 authored by Hirokazu Takata's avatar Hirokazu Takata Committed by Linus Torvalds
Browse files

[PATCH] m32r: revise __raw_read_trylock() 



Signed-off-by: default avatarHirokazu Takata <takata@linux-m32r.org>
Cc: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a27f3113

include/asm-m32r/spinlock.h

+8 −1
Original line number Diff line number Diff line
@@ -298,7 +298,14 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw) 
	);

}



#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 *lock)

{