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cd354f1ae7
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* kernel/mutex-debug.c
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*
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* Debugging code for mutexes
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*
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* Started by Ingo Molnar:
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*
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* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
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*
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* lock debugging, locking tree, deadlock detection started by:
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*
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* Copyright (C) 2004, LynuxWorks, Inc., Igor Manyilov, Bill Huey
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* Released under the General Public License (GPL).
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*/
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#include <linux/mutex.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/poison.h>
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#include <linux/spinlock.h>
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#include <linux/kallsyms.h>
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#include <linux/interrupt.h>
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#include <linux/debug_locks.h>
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#include "mutex-debug.h"
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/*
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* Must be called with lock->wait_lock held.
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*/
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void debug_mutex_set_owner(struct mutex *lock, struct thread_info *new_owner)
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{
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lock->owner = new_owner;
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}
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void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter)
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{
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memset(waiter, MUTEX_DEBUG_INIT, sizeof(*waiter));
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waiter->magic = waiter;
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INIT_LIST_HEAD(&waiter->list);
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}
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void debug_mutex_wake_waiter(struct mutex *lock, struct mutex_waiter *waiter)
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{
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SMP_DEBUG_LOCKS_WARN_ON(!spin_is_locked(&lock->wait_lock));
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DEBUG_LOCKS_WARN_ON(list_empty(&lock->wait_list));
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DEBUG_LOCKS_WARN_ON(waiter->magic != waiter);
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DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
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}
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void debug_mutex_free_waiter(struct mutex_waiter *waiter)
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{
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DEBUG_LOCKS_WARN_ON(!list_empty(&waiter->list));
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memset(waiter, MUTEX_DEBUG_FREE, sizeof(*waiter));
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}
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void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter,
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struct thread_info *ti)
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{
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SMP_DEBUG_LOCKS_WARN_ON(!spin_is_locked(&lock->wait_lock));
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/* Mark the current thread as blocked on the lock: */
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ti->task->blocked_on = waiter;
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waiter->lock = lock;
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}
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void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
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struct thread_info *ti)
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{
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DEBUG_LOCKS_WARN_ON(list_empty(&waiter->list));
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DEBUG_LOCKS_WARN_ON(waiter->task != ti->task);
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DEBUG_LOCKS_WARN_ON(ti->task->blocked_on != waiter);
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ti->task->blocked_on = NULL;
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list_del_init(&waiter->list);
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waiter->task = NULL;
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}
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void debug_mutex_unlock(struct mutex *lock)
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{
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if (unlikely(!debug_locks))
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return;
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DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
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DEBUG_LOCKS_WARN_ON(lock->magic != lock);
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DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
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DEBUG_LOCKS_WARN_ON(lock->owner != current_thread_info());
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}
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void debug_mutex_init(struct mutex *lock, const char *name,
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struct lock_class_key *key)
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{
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#ifdef CONFIG_DEBUG_LOCK_ALLOC
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/*
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* Make sure we are not reinitializing a held lock:
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*/
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debug_check_no_locks_freed((void *)lock, sizeof(*lock));
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lockdep_init_map(&lock->dep_map, name, key, 0);
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#endif
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lock->owner = NULL;
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lock->magic = lock;
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}
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/***
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* mutex_destroy - mark a mutex unusable
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* @lock: the mutex to be destroyed
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*
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* This function marks the mutex uninitialized, and any subsequent
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* use of the mutex is forbidden. The mutex must not be locked when
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* this function is called.
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*/
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void fastcall mutex_destroy(struct mutex *lock)
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{
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DEBUG_LOCKS_WARN_ON(mutex_is_locked(lock));
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lock->magic = NULL;
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}
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EXPORT_SYMBOL_GPL(mutex_destroy);
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