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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 /fs/notify/group.c
parent1404ff3cc3a14cb1fe8535e30b87d20da9513767 (diff)
downloadlinux-c21dbe20f606219fe54faf555b7bc5565487c58f.tar.bz2
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 'fs/notify/group.c')
-rw-r--r--fs/notify/group.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/notify/group.c b/fs/notify/group.c
index b47f7cfdcaa4..fbe3cbebec16 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -45,9 +45,9 @@ static void fsnotify_final_destroy_group(struct fsnotify_group *group)
*/
void fsnotify_group_stop_queueing(struct fsnotify_group *group)
{
- mutex_lock(&group->notification_mutex);
+ spin_lock(&group->notification_lock);
group->shutdown = true;
- mutex_unlock(&group->notification_mutex);
+ spin_unlock(&group->notification_lock);
}
/*
@@ -125,7 +125,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
atomic_set(&group->refcnt, 1);
atomic_set(&group->num_marks, 0);
- mutex_init(&group->notification_mutex);
+ spin_lock_init(&group->notification_lock);
INIT_LIST_HEAD(&group->notification_list);
init_waitqueue_head(&group->notification_waitq);
group->max_events = UINT_MAX;