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Commit fa372810 authored by Hirokazu Takata's avatar Hirokazu Takata Committed by Linus Torvalds
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[PATCH] m32r: update include/asm-m32r/semaphore.h 



This patch updates include/asm-m32r/semaphore.h for good readability and
maintainability.

Signed-off-by: default avatarHirokazu Takata <takata@linux-m32r.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 8e8ff02c

include/asm-m32r/semaphore.h

+4 −60
Original line number Diff line number Diff line
@@ -9,7 +9,7 @@ 
 * SMP- and interrupt-safe semaphores..

 *

 * Copyright (C) 1996  Linus Torvalds

 * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>

 * Copyright (C) 2004, 2006  Hirokazu Takata <takata at linux-m32r.org>

 */



#include <linux/config.h>
@@ -77,27 +77,8 @@ asmlinkage void __up(struct semaphore * sem); 
 */

static inline void down(struct semaphore * sem)

{

	unsigned long flags;

	long count;



	might_sleep();

	local_irq_save(flags);

	__asm__ __volatile__ (

		"# down				\n\t"

		DCACHE_CLEAR("%0", "r4", "%1")

		M32R_LOCK" %0, @%1;		\n\t"

		"addi	%0, #-1;		\n\t"

		M32R_UNLOCK" %0, @%1;		\n\t"

		: "=&r" (count)

		: "r" (&sem->count)

		: "memory"

#ifdef CONFIG_CHIP_M32700_TS1

		, "r4"

#endif	/* CONFIG_CHIP_M32700_TS1 */

	);

	local_irq_restore(flags);



	if (unlikely(count < 0))

	if (unlikely(atomic_dec_return(&sem->count) < 0))

		__down(sem);

}
@@ -107,28 +88,10 @@ static inline void down(struct semaphore * sem) 
 */

static inline int down_interruptible(struct semaphore * sem)

{

	unsigned long flags;

	long count;

	int result = 0;



	might_sleep();

	local_irq_save(flags);

	__asm__ __volatile__ (

		"# down_interruptible		\n\t"

		DCACHE_CLEAR("%0", "r4", "%1")

		M32R_LOCK" %0, @%1;		\n\t"

		"addi	%0, #-1;		\n\t"

		M32R_UNLOCK" %0, @%1;		\n\t"

		: "=&r" (count)

		: "r" (&sem->count)

		: "memory"

#ifdef CONFIG_CHIP_M32700_TS1

		, "r4"

#endif	/* CONFIG_CHIP_M32700_TS1 */

	);

	local_irq_restore(flags);



	if (unlikely(count < 0))

	if (unlikely(atomic_dec_return(&sem->count) < 0))

		result = __down_interruptible(sem);



	return result;
@@ -174,26 +137,7 @@ static inline int down_trylock(struct semaphore * sem) 
 */

static inline void up(struct semaphore * sem)

{

	unsigned long flags;

	long count;



	local_irq_save(flags);

	__asm__ __volatile__ (

		"# up				\n\t"

		DCACHE_CLEAR("%0", "r4", "%1")

		M32R_LOCK" %0, @%1;		\n\t"

		"addi	%0, #1;			\n\t"

		M32R_UNLOCK" %0, @%1;		\n\t"

		: "=&r" (count)

		: "r" (&sem->count)

		: "memory"

#ifdef CONFIG_CHIP_M32700_TS1

		, "r4"

#endif	/* CONFIG_CHIP_M32700_TS1 */

	);

	local_irq_restore(flags);



	if (unlikely(count <= 0))

	if (unlikely(atomic_inc_return(&sem->count) <= 0))

		__up(sem);

}