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authorIngo Molnar <mingo@elte.hu>2006-07-03 03:24:33 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-03 18:27:01 -0400
commit9a11b49a805665e13a56aa067afaf81d43ec1514 (patch)
treebf499956e3f67d1211d68ab1e2eb76645f453dfb /drivers/char
parentfb7e42413a098cc45b3adf858da290033af62bae (diff)
[PATCH] lockdep: better lock debugging
Generic lock debugging: - generalized lock debugging framework. For example, a bug in one lock subsystem turns off debugging in all lock subsystems. - got rid of the caller address passing (__IP__/__IP_DECL__/etc.) from the mutex/rtmutex debugging code: it caused way too much prototype hackery, and lockdep will give the same information anyway. - ability to do silent tests - check lock freeing in vfree too. - more finegrained debugging options, to allow distributions to turn off more expensive debugging features. There's no separate 'held mutexes' list anymore - but there's a 'held locks' stack within lockdep, which unifies deadlock detection across all lock classes. (this is independent of the lockdep validation stuff - lockdep first checks whether we are holding a lock already) Here are the current debugging options: CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y which do: config DEBUG_MUTEXES bool "Mutex debugging, basic checks" config DEBUG_LOCK_ALLOC bool "Detect incorrect freeing of live mutexes" Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/sysrq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index a064ee9181c0..e31f079400fa 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -151,7 +151,7 @@ static struct sysrq_key_op sysrq_mountro_op = {
151static void sysrq_handle_showlocks(int key, struct pt_regs *pt_regs, 151static void sysrq_handle_showlocks(int key, struct pt_regs *pt_regs,
152 struct tty_struct *tty) 152 struct tty_struct *tty)
153{ 153{
154 mutex_debug_show_all_locks(); 154 debug_show_all_locks();
155} 155}
156static struct sysrq_key_op sysrq_showlocks_op = { 156static struct sysrq_key_op sysrq_showlocks_op = {
157 .handler = sysrq_handle_showlocks, 157 .handler = sysrq_handle_showlocks,