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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-02-22 17:04:47 -0800
committerIngo Molnar <mingo@elte.hu>2010-02-25 09:41:01 +0100
commit0632eb3d7563d6a76d49a3860b6352d800c92854 (patch)
treed998e6d4292a21a91ba1333ffdb1866daf1cfee2 /include/linux/rcupdate.h
parentc26d34a5858f96a564c45048bf5f09319d2abad1 (diff)
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rcu: Integrate rcu_dereference_check() message into lockdep
Make rcu_dereference_check() print the list of held locks in addition to the stack dump to ease debugging. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <1266887105-1528-3-git-send-email-paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/rcupdate.h')
-rw-r--r--include/linux/rcupdate.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 839d296a7ac..1a4de31bd7b 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -182,8 +182,8 @@ static inline int rcu_read_lock_sched_held(void)
*/
#define rcu_dereference_check(p, c) \
({ \
- if (debug_locks) \
- WARN_ON_ONCE(!(c)); \
+ if (debug_locks && !(c)) \
+ lockdep_rcu_dereference(__FILE__, __LINE__); \
rcu_dereference_raw(p); \
})