Commit-ID: f07fdec50a13f134ea9608c8fb3f6408c58ef55e
Gitweb: http://git.kernel.org/tip/f07fdec50a13f134ea9608c8fb3f6408c58ef55e
Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
AuthorDate: Tue, 13 Dec 2011 13:20:54 +0100
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Wed, 21 Dec 2011 10:07:39 +0100
lockdep/waitqueues: Add better annotation
-> #2 (&tty->write_wait){-.-...}:
is a lot more informative than:
-> #2 (key#19){-.....}:
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-8zpopbny51023rdb0qq67eye@xxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
include/linux/wait.h | 4 ++--
kernel/wait.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 3efc9f3..a9ce45e 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -77,13 +77,13 @@ struct task_struct;
#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \
{ .flags = word, .bit_nr = bit, }
-extern void __init_waitqueue_head(wait_queue_head_t *q, struct lock_class_key *);
+extern void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *);
#define init_waitqueue_head(q) \
do { \
static struct lock_class_key __key; \
\
- __init_waitqueue_head((q), &__key); \
+ __init_waitqueue_head((q), #q, &__key); \
} while (0)
#ifdef CONFIG_LOCKDEP
diff --git a/kernel/wait.c b/kernel/wait.c
index 26fa779..7fdd9ea 100644
--- a/kernel/wait.c
+++ b/kernel/wait.c
@@ -10,10 +10,10 @@
#include <linux/wait.h>
#include <linux/hash.h>
-void __init_waitqueue_head(wait_queue_head_t *q, struct lock_class_key *key)
+void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *key)
{
spin_lock_init(&q->lock);
- lockdep_set_class(&q->lock, key);
+ lockdep_set_class_and_name(&q->lock, key, name);
INIT_LIST_HEAD(&q->task_list);
}
--
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