[S390] s390-kvm: leave sie context on work. Removes preemption requirement

[safe/jmp/linux-2.6] / include / asm-mn10300 / semaphore.h

diff --git a/include/asm-mn10300/semaphore.h b/include/asm-mn10300/semaphore.h
index 5a9e1ad..d9b2034 100644 (file)
--- a/include/asm-mn10300/semaphore.h
+++ b/include/asm-mn10300/semaphore.h
@@ -1,169 +1 @@
-/* MN10300 Semaphores
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#ifndef _ASM_SEMAPHORE_H
-#define _ASM_SEMAPHORE_H
-
-#ifndef __ASSEMBLY__
-
-#include <linux/linkage.h>
-#include <linux/wait.h>
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
-
-#define SEMAPHORE_DEBUG                0
-
-/*
- * the semaphore definition
- * - if count is >0 then there are tokens available on the semaphore for down
- *   to collect
- * - if count is <=0 then there are no spare tokens, and anyone that wants one
- *   must wait
- * - if wait_list is not empty, then there are processes waiting for the
- *   semaphore
- */
-struct semaphore {
-       atomic_t                count;          /* it's not really atomic, it's
-                                                * just that certain modules
-                                                * expect to be able to access
-                                                * it directly */
-       spinlock_t              wait_lock;
-       struct list_head        wait_list;
-#if SEMAPHORE_DEBUG
-       unsigned                __magic;
-#endif
-};
-
-#if SEMAPHORE_DEBUG
-# define __SEM_DEBUG_INIT(name) , (long)&(name).__magic
-#else
-# define __SEM_DEBUG_INIT(name)
-#endif
-
-
-#define __SEMAPHORE_INITIALIZER(name, init_count)                      \
-{                                                                      \
-       .count          = ATOMIC_INIT(init_count),                      \
-       .wait_lock      = __SPIN_LOCK_UNLOCKED((name).wait_lock),       \
-       .wait_list      = LIST_HEAD_INIT((name).wait_list)              \
-       __SEM_DEBUG_INIT(name)                                          \
-}
-
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
-       struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
-
-#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name, 1)
-#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name, 0)
-
-static inline void sema_init(struct semaphore *sem, int val)
-{
-       *sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
-}
-
-static inline void init_MUTEX(struct semaphore *sem)
-{
-       sema_init(sem, 1);
-}
-
-static inline void init_MUTEX_LOCKED(struct semaphore *sem)
-{
-       sema_init(sem, 0);
-}
-
-extern void __down(struct semaphore *sem, unsigned long flags);
-extern int  __down_interruptible(struct semaphore *sem, unsigned long flags);
-extern void __up(struct semaphore *sem);
-
-static inline void down(struct semaphore *sem)
-{
-       unsigned long flags;
-       int count;
-
-#if SEMAPHORE_DEBUG
-       CHECK_MAGIC(sem->__magic);
-#endif
-
-       spin_lock_irqsave(&sem->wait_lock, flags);
-       count = atomic_read(&sem->count);
-       if (likely(count > 0)) {
-               atomic_set(&sem->count, count - 1);
-               spin_unlock_irqrestore(&sem->wait_lock, flags);
-       } else {
-               __down(sem, flags);
-       }
-}
-
-static inline int down_interruptible(struct semaphore *sem)
-{
-       unsigned long flags;
-       int count, ret = 0;
-
-#if SEMAPHORE_DEBUG
-       CHECK_MAGIC(sem->__magic);
-#endif
-
-       spin_lock_irqsave(&sem->wait_lock, flags);
-       count = atomic_read(&sem->count);
-       if (likely(count > 0)) {
-               atomic_set(&sem->count, count - 1);
-               spin_unlock_irqrestore(&sem->wait_lock, flags);
-       } else {
-               ret = __down_interruptible(sem, flags);
-       }
-       return ret;
-}
-
-/*
- * non-blockingly attempt to down() a semaphore.
- * - returns zero if we acquired it
- */
-static inline int down_trylock(struct semaphore *sem)
-{
-       unsigned long flags;
-       int count, success = 0;
-
-#if SEMAPHORE_DEBUG
-       CHECK_MAGIC(sem->__magic);
-#endif
-
-       spin_lock_irqsave(&sem->wait_lock, flags);
-       count = atomic_read(&sem->count);
-       if (likely(count > 0)) {
-               atomic_set(&sem->count, count - 1);
-               success = 1;
-       }
-       spin_unlock_irqrestore(&sem->wait_lock, flags);
-       return !success;
-}
-
-static inline void up(struct semaphore *sem)
-{
-       unsigned long flags;
-
-#if SEMAPHORE_DEBUG
-       CHECK_MAGIC(sem->__magic);
-#endif
-
-       spin_lock_irqsave(&sem->wait_lock, flags);
-       if (!list_empty(&sem->wait_list))
-               __up(sem);
-       else
-               atomic_set(&sem->count, atomic_read(&sem->count) + 1);
-       spin_unlock_irqrestore(&sem->wait_lock, flags);
-}
-
-static inline int sem_getcount(struct semaphore *sem)
-{
-       return atomic_read(&sem->count);
-}
-
-#endif /* __ASSEMBLY__ */
-
-#endif
+#include <linux/semaphore.h>