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authorJan Kara <jack@suse.cz>2016-10-07 16:56:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-07 18:46:26 -0700
commitc21dbe20f606219fe54faf555b7bc5565487c58f (patch)
tree91e57fe4aad1f1358f099521b570d9daf7b6a758 /include/linux/fsnotify_backend.h
parent1404ff3cc3a14cb1fe8535e30b87d20da9513767 (diff)
fsnotify: convert notification_mutex to a spinlock
notification_mutex is used to protect the list of pending events. As such there's no reason to use a sleeping lock for it. Convert it to a spinlock. [jack@suse.cz: fixed version] Link: http://lkml.kernel.org/r/1474031567-1831-1-git-send-email-jack@suse.cz Link: http://lkml.kernel.org/r/1473797711-14111-5-git-send-email-jack@suse.cz Signed-off-by: Jan Kara <jack@suse.cz> Reviewed-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Tested-by: Guenter Roeck <linux@roeck-us.net> Cc: Miklos Szeredi <mszeredi@redhat.com> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/fsnotify_backend.h')
-rw-r--r--include/linux/fsnotify_backend.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 7268ed076be8..0713e873b1c9 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -135,7 +135,7 @@ struct fsnotify_group {
const struct fsnotify_ops *ops; /* how this group handles things */
/* needed to send notification to userspace */
- struct mutex notification_mutex; /* protect the notification_list */
+ spinlock_t notification_lock; /* protect the notification_list */
struct list_head notification_list; /* list of event_holder this group needs to send to userspace */
wait_queue_head_t notification_waitq; /* read() on the notification file blocks on this waitq */
unsigned int q_len; /* events on the queue */