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Commit 65316fd1 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[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: default avatarRalf Baechle <ralf@linux-mips.org>
parent 09f451bf

include/asm-mips/spinlock.h

+46 −1
Original line number Diff line number Diff line
@@ -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 */