From 5eb7f9fa847b8ab6e4864bfb8cb45f370844a47c Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Wed, 26 Mar 2008 12:04:09 +0100
Subject: [PATCH] relay: set an spd_release() hook for splice
relay doesn't reference the pages it adds, however we need a non-NULL
hook or splice_to_pipe() can oops.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
kernel/relay.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/relay.c b/kernel/relay.c
index ed3f6cf2db86..d6204a485818 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1056,6 +1056,10 @@ static struct pipe_buf_operations relay_pipe_buf_ops = {
.get = generic_pipe_buf_get,
};
+static void relay_page_release(struct splice_pipe_desc *spd, unsigned int i)
+{
+}
+
/*
* subbuf_splice_actor - splice up to one subbuf's worth of data
*/
@@ -1083,6 +1087,7 @@ static int subbuf_splice_actor(struct file *in,
.partial = partial,
.flags = flags,
.ops = &relay_pipe_buf_ops,
+ .spd_release = relay_page_release,
};
if (rbuf->subbufs_produced == rbuf->subbufs_consumed)
--
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