Commit 9ea0f043 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] Terminally fix local_{dec,sub}_if_positive 



They contain 64-bit instructions so wouldn't work on 32-bit kernels or
32-bit hardware.  Since there are no users, blow them away.  They
probably were only ever created because there are atomic_sub_if_positive
and atomic_dec_if_positive which exist only for sake of semaphores.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent fef74705

include/asm-mips/local.h

+0 −68
Original line number Diff line number Diff line
@@ -115,68 +115,6 @@ static __inline__ long local_sub_return(long i, local_t * l) 
	return result;

}



/*

 * local_sub_if_positive - conditionally subtract integer from atomic variable

 * @i: integer value to subtract

 * @l: pointer of type local_t

 *

 * Atomically test @l and subtract @i if @l is greater or equal than @i.

 * The function returns the old value of @l minus @i.

 */

static __inline__ long local_sub_if_positive(long i, local_t * l)

{

	unsigned long result;



	if (cpu_has_llsc && R10000_LLSC_WAR) {

		unsigned long temp;



		__asm__ __volatile__(

		"	.set	mips3					\n"

		"1:"	__LL	"%1, %2		# local_sub_if_positive\n"

		"	dsubu	%0, %1, %3				\n"

		"	bltz	%0, 1f					\n"

			__SC	"%0, %2					\n"

		"	.set	noreorder				\n"

		"	beqzl	%0, 1b					\n"

		"	 dsubu	%0, %1, %3				\n"

		"	.set	reorder					\n"

		"1:							\n"

		"	.set	mips0					\n"

		: "=&r" (result), "=&r" (temp), "=m" (l->a.counter)

		: "Ir" (i), "m" (l->a.counter)

		: "memory");

	} else if (cpu_has_llsc) {

		unsigned long temp;



		__asm__ __volatile__(

		"	.set	mips3					\n"

		"1:"	__LL	"%1, %2		# local_sub_if_positive\n"

		"	dsubu	%0, %1, %3				\n"

		"	bltz	%0, 1f					\n"

			__SC	"%0, %2					\n"

		"	.set	noreorder				\n"

		"	beqz	%0, 1b					\n"

		"	 dsubu	%0, %1, %3				\n"

		"	.set	reorder					\n"

		"1:							\n"

		"	.set	mips0					\n"

		: "=&r" (result), "=&r" (temp), "=m" (l->a.counter)

		: "Ir" (i), "m" (l->a.counter)

		: "memory");

	} else {

		unsigned long flags;



		local_irq_save(flags);

		result = l->a.counter;

		result -= i;

		if (result >= 0)

			l->a.counter = result;

		local_irq_restore(flags);

	}



	return result;

}



#define local_cmpxchg(l, o, n) \

	((long)cmpxchg_local(&((l)->a.counter), (o), (n)))

#define local_xchg(l, n) (xchg_local(&((l)->a.counter),(n)))
@@ -234,12 +172,6 @@ static __inline__ long local_sub_if_positive(long i, local_t * l) 
 */

#define local_dec_and_test(l) (local_sub_return(1, (l)) == 0)



/*

 * local_dec_if_positive - decrement by 1 if old value positive

 * @l: pointer of type local_t

 */

#define local_dec_if_positive(l)	local_sub_if_positive(1, l)



/*

 * local_add_negative - add and test if negative

 * @l: pointer of type local_t

CRA Git | Maintained and supported by SUSTech CRA and CCSE