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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-11 22:11:12 +0200
committerPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-11 22:11:12 +0200
commit851a67b825540a8e00c0be3ee25e4627ba8b133b (patch)
tree07afd72ad74a392cb30cefcd01acdfd9b01282d3 /kernel/rcupdate.c
parent34a3d1e83708702ac6cb872215e68cd07dae298b (diff)
lockdep: annotate rcu_read_{,un}lock{,_bh}
lockdep annotate rcu_read_{,un}lock{,_bh} in order to catch imbalanced usage. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcupdate.c')
-rw-r--r--kernel/rcupdate.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 2c2dd8410dc..130214f3d22 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -49,6 +49,14 @@
#include <linux/cpu.h>
#include <linux/mutex.h>
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+static struct lock_class_key rcu_lock_key;
+struct lockdep_map rcu_lock_map =
+ STATIC_LOCKDEP_MAP_INIT("rcu_read_lock", &rcu_lock_key);
+
+EXPORT_SYMBOL_GPL(rcu_lock_map);
+#endif
+
/* Definition for rcupdate control block. */
static struct rcu_ctrlblk rcu_ctrlblk = {
.cur = -300,