From c21dbe20f606219fe54faf555b7bc5565487c58f Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Fri, 7 Oct 2016 16:56:52 -0700 Subject: 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 Reviewed-by: Lino Sanfilippo Tested-by: Guenter Roeck Cc: Miklos Szeredi Cc: Eric Paris Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/fsnotify_backend.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') 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 */ -- cgit v1.2.3