This is a note to let you know that I've just added the patch titled
xen-netback: remove pointless clause from if statement
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xen-netback-remove-pointless-clause-from-if-statement.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Apr 10 22:03:05 PDT 2014
From: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
Date: Fri, 28 Mar 2014 11:39:05 +0000
Subject: xen-netback: remove pointless clause from if statement
From: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
[ Upstream commit 0576eddf24df716d8570ef8ca11452a9f98eaab2 ]
This patch removes a test in start_new_rx_buffer() that checks whether
a copy operation is less than MAX_BUFFER_OFFSET in length, since
MAX_BUFFER_OFFSET is defined to be PAGE_SIZE and the only caller of
start_new_rx_buffer() already limits copy operations to PAGE_SIZE or less.
Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Reported-By: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Tested-By: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/xen-netback/netback.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -203,8 +203,8 @@ static bool start_new_rx_buffer(int offs
* into multiple copies tend to give large frags their
* own buffers as before.
*/
- if ((offset + size > MAX_BUFFER_OFFSET) &&
- (size <= MAX_BUFFER_OFFSET) && offset && !head)
+ BUG_ON(size > MAX_BUFFER_OFFSET);
+ if ((offset + size > MAX_BUFFER_OFFSET) && offset && !head)
return true;
return false;
Patches currently in stable-queue which might be from Paul.Durrant@xxxxxxxxxx are
queue-3.13/xen-netback-remove-pointless-clause-from-if-statement.patch
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