fs/splice: Pull buf->ops->confirm() from splice_from_pipe actors

This patch pulls calls to buf->ops->confirm() from all actors passed
(also indirectly) to splice_from_pipe_feed().

Is avoiding the call to buf->ops->confirm() while splice()ing to
/dev/null is an intentional optimization? No other user does that
and this will remove this special case.

Against current linux.git 6313e3c21743cc88bb5bd8aa72948ee1e83937b6.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 7ea0bea2f7e3..c87b0840d2cb 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -397,10 +397,6 @@ lo_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
         sector_t IV;
         int size, ret;
 
-        ret = buf->ops->confirm(pipe, buf);
-        if (unlikely(ret))
-                return ret;
-
         IV = ((sector_t) page->index << (PAGE_CACHE_SHIFT - 9)) +
                                                         (buf->offset >> 9);
         size = sd->len;