Hi Andrew,
I love CONFIG_DEBUG_MUTEXES.
Could you please pick up following patch?
=====================================
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Patch against: mmotm 09/13
Patch name: fix-a-race-condtion-of-oops_in_progress-fix2.patch
Applied after: fix-a-race-condtion-of-oops_in_progress-fix.patch
if CONFIG_DEBUG_MUTEXES=y, mutex.c makes following build error.
because oops_in_progress was changed from int to atomic_t.
------------------------------------------------------------------
CC kernel/mutex.o
kernel/mutex.c: In function '__mutex_lock_common':
kernel/mutex.c:135: error: wrong type argument to unary exclamation mark
kernel/mutex.c:135: error: wrong type argument to unary exclamation mark
kernel/mutex.c:183: error: wrong type argument to unary exclamation mark
kernel/mutex.c:183: error: wrong type argument to unary exclamation mark
kernel/mutex.c: In function '__mutex_unlock_common_slowpath':
kernel/mutex.c:240: error: wrong type argument to unary exclamation mark
kernel/mutex.c:240: error: wrong type argument to unary exclamation mark
kernel/mutex.c: In function '__mutex_trylock_slowpath':
kernel/mutex.c:351: error: wrong type argument to unary exclamation mark
kernel/mutex.c:351: error: wrong type argument to unary exclamation mark
make[1]: *** [kernel/mutex.o] Error 1
make: *** [kernel] Error 2
---------------------------------------------------------------
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: Huang Ying <ying.huang@intel.com>
CC: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/debug_locks.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: b/include/linux/debug_locks.h
===================================================================
--- a/include/linux/debug_locks.h
+++ b/include/linux/debug_locks.h
@@ -17,7 +17,7 @@ extern int debug_locks_off(void);
({ \
int __ret = 0; \
\
- if (!oops_in_progress && unlikely(c)) { \
+ if (!atomic_read(&oops_in_progress) && unlikely(c)) { \
if (debug_locks_off() && !debug_locks_silent) \
WARN_ON(1); \
__ret = 1; \
--
