Make sock_sendpage() use kernel_sendpage()

kernel_sendpage() does the proper default case handling for when the
socket doesn't have a native sendpage implementation.

Now, arguably this might be something that we could instead solve by
just specifying that all protocols should do it themselves at the
protocol level, but we really only care about the common protocols.
Does anybody really care about sendpage on something like Appletalk? Not
likely.

Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Julien TINNES <julien@cr0.org>
Acked-by: Tavis Ormandy <taviso@sdf.lonestar.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/net/socket.c b/net/socket.c
index 791d71a36a93dfec5166fe05e2e0cb394cfa904b..6d47165590473daa4990bf69b0435d5c49b41302 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -736,7 +736,7 @@ static ssize_t sock_sendpage(struct file *file, struct page *page,
        if (more)
                flags |= MSG_MORE;
 
-       return sock->ops->sendpage(sock, page, offset, size, flags);
+       return kernel_sendpage(sock, page, offset, size, flags);
 }
 
 static ssize_t sock_splice_read(struct file *file, loff_t *ppos,