[PATCH] pi-futex: rt mutex debug

Runtime debugging functionality for rt-mutexes. Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
josf · Jun 28, 2006 · e7eebaf · e7eebaf
1 parent a6537be
commit e7eebaf
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Showing 8 changed files with 581 additions and 1 deletion.
diff --git a/include/linux/mm.h b/include/linux/mm.h
@@ -1034,6 +1034,7 @@ static inline void
 debug_check_no_locks_freed(const void *from, unsigned long len)
 {
 	mutex_debug_check_no_locks_freed(from, len);
+	rt_mutex_debug_check_no_locks_freed(from, len);
 }
 
 #ifndef CONFIG_DEBUG_PAGEALLOC

diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
@@ -40,6 +40,19 @@ struct rt_mutex {
 struct rt_mutex_waiter;
 struct hrtimer_sleeper;
 
+#ifdef CONFIG_DEBUG_RT_MUTEXES
+ extern int rt_mutex_debug_check_no_locks_freed(const void *from,
+						unsigned long len);
+ extern void rt_mutex_debug_check_no_locks_held(struct task_struct *task);
+#else
+ static inline int rt_mutex_debug_check_no_locks_freed(const void *from,
+						       unsigned long len)
+ {
+	return 0;
+ }
+# define rt_mutex_debug_check_no_locks_held(task)	do { } while (0)
+#endif
+
 #ifdef CONFIG_DEBUG_RT_MUTEXES
 # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname) \
 	, .name = #mutexname, .file = __FILE__, .line = __LINE__
@@ -48,7 +61,7 @@ struct hrtimer_sleeper;
 #else
 # define __DEBUG_RT_MUTEX_INITIALIZER(mutexname)
 # define rt_mutex_init(mutex)			__rt_mutex_init(mutex, NULL)
-# define rt_mutex_debug_task_free(t)		do { } while (0)
+# define rt_mutex_debug_task_free(t)			do { } while (0)
 #endif
 
 #define __RT_MUTEX_INITIALIZER(mutexname) \

diff --git a/kernel/Makefile b/kernel/Makefile
@@ -17,6 +17,7 @@ ifeq ($(CONFIG_COMPAT),y)
 obj-$(CONFIG_FUTEX) += futex_compat.o
 endif
 obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
+obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
 obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o
 obj-$(CONFIG_SMP) += cpu.o spinlock.o
 obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o

diff --git a/kernel/exit.c b/kernel/exit.c
@@ -929,6 +929,7 @@ fastcall NORET_TYPE void do_exit(long code)
 	 * If DEBUG_MUTEXES is on, make sure we are holding no locks:
 	 */
 	mutex_debug_check_no_locks_held(tsk);
+	rt_mutex_debug_check_no_locks_held(tsk);
 
 	if (tsk->io_context)
 		exit_io_context();