patch-2.4.5 linux/include/asm-ppc/semaphore-helper.h

• Lines: 110
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.4/linux/include/asm-ppc/semaphore-helper.h
• Orig date: Sat Nov 11 18:23:11 2000

diff -u --recursive --new-file v2.4.4/linux/include/asm-ppc/semaphore-helper.h linux/include/asm-ppc/semaphore-helper.h
@@ -1,109 +0,0 @@
-#ifdef __KERNEL__
-#ifndef _PPC_SEMAPHORE_HELPER_H
-#define _PPC_SEMAPHORE_HELPER_H
-
-/*
- * SMP- and interrupt-safe semaphores..
- *
- * (C) Copyright 1996 Linus Torvalds
- * Adapted for PowerPC by Gary Thomas and Paul Mackerras
- */
-
-#include <asm/atomic.h>
-
-/*
- * These two (wake_one_more and waking_non_zero) _must_ execute
- * atomically wrt each other.
- *
- * This is trivially done with load with reservation and
- * store conditional on the ppc.
- */
-
-static inline void wake_one_more(struct semaphore * sem)
-{
-	atomic_inc(&sem->waking);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
-	int ret, tmp;
-
-	/* Atomic decrement sem->waking iff it is > 0 */
-	__asm__ __volatile__(
-		"1:	lwarx %1,0,%2\n"	/* tmp = sem->waking */
-		"	cmpwi 0,%1,0\n"		/* test tmp */
-		"	addic %1,%1,-1\n"	/* --tmp */
-		"	ble- 2f\n"		/* exit if tmp was <= 0 */
-		"	stwcx. %1,0,%2\n"	/* update sem->waking */
-		"	bne- 1b\n"		/* try again if update failed*/
-		"	li %0,1\n"		/* ret = 1 */
-		"2:"
-		: "=r" (ret), "=&r" (tmp)
-		: "r" (&sem->waking), "0" (0)
-		: "cr0", "memory");
-
-	return ret;
-}
-/*
- * waking_non_zero_interruptible:
- *	1	got the lock
- *	0	go to sleep
- *	-EINTR	interrupted
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
-						struct task_struct *tsk)
-{
-	int ret, tmp;
-
-	/* Atomic decrement sem->waking iff it is > 0 */
-	__asm__ __volatile__(
-		"1:	lwarx %1,0,%2\n"	/* tmp = sem->waking */
-		"	cmpwi 0,%1,0\n"		/* test tmp */
-		"	addic %1,%1,-1\n"	/* --tmp */
-		"	ble- 2f\n"		/* exit if tmp was <= 0 */
-		"	stwcx. %1,0,%2\n"	/* update sem->waking */
-		"	bne- 1b\n"		/* try again if update failed*/
-		"	li %0,1\n"		/* ret = 1 */
-		"2:"
-		: "=r" (ret), "=&r" (tmp)
-		: "r" (&sem->waking), "0" (0)
-		: "cr0", "memory");
-
-	if (ret == 0 && signal_pending(tsk)) {
-		atomic_inc(&sem->count);
-		ret = -EINTR;
-	}
-	return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- *	1	failed to lock
- *	0	got the lock
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
-	int ret, tmp;
-
-	/* Atomic decrement sem->waking iff it is > 0 */
-	__asm__ __volatile__(
-		"1:	lwarx %1,0,%2\n"	/* tmp = sem->waking */
-		"	cmpwi 0,%1,0\n"		/* test tmp */
-		"	addic %1,%1,-1\n"	/* --tmp */
-		"	ble- 2f\n"		/* exit if tmp was <= 0 */
-		"	stwcx. %1,0,%2\n"	/* update sem->waking */
-		"	bne- 1b\n"		/* try again if update failed*/
-		"	li %0,0\n"		/* ret = 0 */
-		"2:"
-		: "=r" (ret), "=&r" (tmp)
-		: "r" (&sem->waking), "0" (1)
-		: "cr0", "memory");
-
-	if (ret)
-		atomic_inc(&sem->count);
-
-	return ret;
-}
-
-#endif /* _PPC_SEMAPHORE_HELPER_H */
-#endif /* __KERNEL__ */