This is a note to let you know that I've just added the patch titled
fs: compat: Remove warning from COMPATIBLE_IOCTL
to the 4.9-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:
fs-compat-remove-warning-from-compatible_ioctl.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9280cdd6fe5b8287a726d24cc1d558b96c8491d7 Mon Sep 17 00:00:00 2001
From: Mark Charlebois <charlebm@xxxxxxxxx>
Date: Fri, 28 Apr 2017 15:15:12 -0700
Subject: fs: compat: Remove warning from COMPATIBLE_IOCTL
From: Mark Charlebois <charlebm@xxxxxxxxx>
commit 9280cdd6fe5b8287a726d24cc1d558b96c8491d7 upstream.
cmd in COMPATIBLE_IOCTL is always a u32, so cast it so there isn't a
warning about an overflow in XFORM.
From: Mark Charlebois <charlebm@xxxxxxxxx>
Signed-off-by: Mark Charlebois <charlebm@xxxxxxxxx>
Signed-off-by: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/compat_ioctl.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -833,7 +833,7 @@ static int compat_ioctl_preallocate(stru
*/
#define XFORM(i) (((i) ^ ((i) << 27) ^ ((i) << 17)) & 0xffffffff)
-#define COMPATIBLE_IOCTL(cmd) XFORM(cmd),
+#define COMPATIBLE_IOCTL(cmd) XFORM((u32)cmd),
/* ioctl should not be warned about even if it's not implemented.
Valid reasons to use this:
- It is implemented with ->compat_ioctl on some device, but programs
Patches currently in stable-queue which might be from charlebm@xxxxxxxxx are
queue-4.9/fs-compat-remove-warning-from-compatible_ioctl.patch