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splice: only check do_wakeup in splice_to_pipe() for a real pipe 

We only ever set do_wakeup to non-zero if the pipe has an inode
backing, so it's pointless to check outside the pipe->inode
check.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-06-15 13:16:13 +02:00
parent 00de00bdad
commit 02676e5aee
1 changed files with 7 additions and 6 deletions
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13
fs/splice.c
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@ -245,14 +245,15 @@ static ssize_t splice_to_pipe(struct pipe_inode_info *pipe,
pipe->waiting_writers--;
}
if (pipe->inode)
if (pipe->inode) {
mutex_unlock(&pipe->inode->i_mutex);
if (do_wakeup) {
smp_mb();
if (waitqueue_active(&pipe->wait))
wake_up_interruptible(&pipe->wait);
kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
if (do_wakeup) {
smp_mb();
if (waitqueue_active(&pipe->wait))
wake_up_interruptible(&pipe->wait);
kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
}
}
while (page_nr < spd_pages)