53b9d87f41
in: > http://bugzilla.kernel.org/show_bug.cgi?id=11543 The panic code called the kexec code which called mutex_trylock() which called spin_lock_mutex() which then stupidly went and blurted a load of debug stuff because of in_interrupt(). Keep the lock debug code from escallating an already crappy situation. Signed-off-by: Ingo Molnar <mingo@elte.hu>
73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
#ifndef __LINUX_DEBUG_LOCKING_H
|
|
#define __LINUX_DEBUG_LOCKING_H
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
struct task_struct;
|
|
|
|
extern int debug_locks;
|
|
extern int debug_locks_silent;
|
|
|
|
/*
|
|
* Generic 'turn off all lock debugging' function:
|
|
*/
|
|
extern int debug_locks_off(void);
|
|
|
|
#define DEBUG_LOCKS_WARN_ON(c) \
|
|
({ \
|
|
int __ret = 0; \
|
|
\
|
|
if (!oops_in_progress && unlikely(c)) { \
|
|
if (debug_locks_off() && !debug_locks_silent) \
|
|
WARN_ON(1); \
|
|
__ret = 1; \
|
|
} \
|
|
__ret; \
|
|
})
|
|
|
|
#ifdef CONFIG_SMP
|
|
# define SMP_DEBUG_LOCKS_WARN_ON(c) DEBUG_LOCKS_WARN_ON(c)
|
|
#else
|
|
# define SMP_DEBUG_LOCKS_WARN_ON(c) do { } while (0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_DEBUG_LOCKING_API_SELFTESTS
|
|
extern void locking_selftest(void);
|
|
#else
|
|
# define locking_selftest() do { } while (0)
|
|
#endif
|
|
|
|
struct task_struct;
|
|
|
|
#ifdef CONFIG_LOCKDEP
|
|
extern void debug_show_all_locks(void);
|
|
extern void __debug_show_held_locks(struct task_struct *task);
|
|
extern void debug_show_held_locks(struct task_struct *task);
|
|
extern void debug_check_no_locks_freed(const void *from, unsigned long len);
|
|
extern void debug_check_no_locks_held(struct task_struct *task);
|
|
#else
|
|
static inline void debug_show_all_locks(void)
|
|
{
|
|
}
|
|
|
|
static inline void __debug_show_held_locks(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
static inline void debug_show_held_locks(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
debug_check_no_locks_freed(const void *from, unsigned long len)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
debug_check_no_locks_held(struct task_struct *task)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif
|