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[PATCH] mutex subsystem, debugging code

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mutex implementation - add debugging code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
This commit is contained in:
Ingo Molnar
2006-01-09 15:59:20 -08:00
committed by Ingo Molnar
parent f3f54ffa70
commit 408894ee4d
7 changed files with 637 additions and 0 deletions
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21
include/linux/mutex-debug.h Normal file
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@@ -0,0 +1,21 @@
#ifndef __LINUX_MUTEX_DEBUG_H
#define __LINUX_MUTEX_DEBUG_H
/*
* Mutexes - debugging helpers:
*/
#define __DEBUG_MUTEX_INITIALIZER(lockname) \
, .held_list = LIST_HEAD_INIT(lockname.held_list), \
.name = #lockname , .magic = &lockname
#define mutex_init(sem) __mutex_init(sem, __FUNCTION__)
extern void FASTCALL(mutex_destroy(struct mutex *lock));
extern void mutex_debug_show_all_locks(void);
extern void mutex_debug_show_held_locks(struct task_struct *filter);
extern void mutex_debug_check_no_locks_held(struct task_struct *task);
extern void mutex_debug_check_no_locks_freed(const void *from, const void *to);
#endif

5
include/linux/sched.h
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@@ -817,6 +817,11 @@ struct task_struct {
/* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */
spinlock_t proc_lock;
#ifdef CONFIG_DEBUG_MUTEXES
/* mutex deadlock detection */
struct mutex_waiter *blocked_on;
#endif
/* journalling filesystem info */
void *journal_info;