patch-2.4.4 linux/include/asm-s390/semaphore-helper.h

• Lines: 101
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.3/linux/include/asm-s390/semaphore-helper.h
• Orig date: Fri May 12 11:41:44 2000

diff -u --recursive --new-file v2.4.3/linux/include/asm-s390/semaphore-helper.h linux/include/asm-s390/semaphore-helper.h
@@ -1,100 +0,0 @@
-/*
- *  include/asm-s390/semaphore-helper.h
- *
- *  S390 version
- *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *
- *  Derived from "include/asm-i386/semaphore-helper.h"
- *    (C) Copyright 1996 Linus Torvalds
- *    (C) Copyright 1999 Andrea Arcangeli
- */
-
-#ifndef _S390_SEMAPHORE_HELPER_H
-#define _S390_SEMAPHORE_HELPER_H
-
-/*
- * These two _must_ execute atomically wrt each other.
- *
- * This is trivially done with load_locked/store_cond,
- * but on the x86 we need an external synchronizer.
- */
-static inline void wake_one_more(struct semaphore * sem)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&semaphore_wake_lock, flags);
-	sem->waking++;
-	spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-}
-
-static inline int waking_non_zero(struct semaphore *sem)
-{
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&semaphore_wake_lock, flags);
-	if (sem->waking > 0) {
-		sem->waking--;
-		ret = 1;
-	}
-	spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-	return ret;
-}
-
-/*
- * waking_non_zero_interruptible:
- *	1	got the lock
- *	0	go to sleep
- *	-EINTR	interrupted
- *
- * If we give up we must undo our count-decrease we previously did in down().
- * Subtle: up() can continue to happens and increase the semaphore count
- * even during our critical section protected by the spinlock. So
- * we must remeber to undo the sem->waking that will be run from
- * wake_one_more() some time soon, if the semaphore count become > 0.
- */
-static inline int waking_non_zero_interruptible(struct semaphore *sem,
-						struct task_struct *tsk)
-{
-	unsigned long flags;
-	int ret = 0;
-
-	spin_lock_irqsave(&semaphore_wake_lock, flags);
-	if (sem->waking > 0) {
-		sem->waking--;
-		ret = 1;
-	} else if (signal_pending(tsk)) {
-               if (atomic_inc_and_test_greater_zero(&sem->count))
-                       sem->waking--;
-		ret = -EINTR;
-	}
-	spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-	return ret;
-}
-
-/*
- * waking_non_zero_trylock:
- *	1	failed to lock
- *	0	got the lock
- *
- * Implementation details are the same of the interruptible case.
- */
-static inline int waking_non_zero_trylock(struct semaphore *sem)
-{
-	unsigned long flags;
-	int ret = 1;
-
-	spin_lock_irqsave(&semaphore_wake_lock, flags);
-	if (sem->waking <= 0)
-        {
-                if (atomic_inc_and_test_greater_zero(&sem->count))
-                        sem->waking--;
-        } else {
-		sem->waking--;
-		ret = 0;
-	}
-	spin_unlock_irqrestore(&semaphore_wake_lock, flags);
-	return ret;
-}
-
-#endif