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authorJeff Garzik <jeff@garzik.org>2006-04-20 17:27:45 -0400
committerJeff Garzik <jeff@garzik.org>2006-04-20 17:27:45 -0400
commit9707b27100a48950f1e15e08a7c5028786e47f55 (patch)
tree5745b1e7497ae1499a2e2e9e0a567996419ab34f /include/asm-m32r/semaphore.h
parent8fc65162a8f25929be80c8d6321a3479e92b5aae (diff)
parent402a26f0c040077ed6f941eefac5a6971f0d5f40 (diff)
downloadop-kernel-dev-9707b27100a48950f1e15e08a7c5028786e47f55.zip
op-kernel-dev-9707b27100a48950f1e15e08a7c5028786e47f55.tar.gz
Merge branch 'master'
Diffstat (limited to 'include/asm-m32r/semaphore.h')
-rw-r--r--include/asm-m32r/semaphore.h64
1 files changed, 4 insertions, 60 deletions
diff --git a/include/asm-m32r/semaphore.h b/include/asm-m32r/semaphore.h
index bf447c5..81750ed 100644
--- a/include/asm-m32r/semaphore.h
+++ b/include/asm-m32r/semaphore.h
@@ -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);
}
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