fuse: fix reserved request wake up

Use wake_up_all instead of wake_up in put_reserved_req(), otherwise it is
possible that the right task is not woken up.

Also create a separate reserved_req_waitq in addition to the blocked_waitq,
since they fulfill totally separate functions.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 807988445685..95c8a9738ca7 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -232,6 +232,7 @@ static void fuse_put_super(struct super_block *sb)
         kill_fasync(&fc->fasync, SIGIO, POLL_IN);
         wake_up_all(&fc->waitq);
         wake_up_all(&fc->blocked_waitq);
+        wake_up_all(&fc->reserved_req_waitq);
         mutex_lock(&fuse_mutex);
         list_del(&fc->entry);
         fuse_ctl_remove_conn(fc);
@@ -410,6 +411,7 @@ static struct fuse_conn *new_conn(void)
                 atomic_set(&fc->count, 1);
                 init_waitqueue_head(&fc->waitq);
                 init_waitqueue_head(&fc->blocked_waitq);
+                init_waitqueue_head(&fc->reserved_req_waitq);
                 INIT_LIST_HEAD(&fc->pending);
                 INIT_LIST_HEAD(&fc->processing);
                 INIT_LIST_HEAD(&fc->io);