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%3Ba=su...

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@vger.kernel.org know about it.

From 9280cdd6fe5b8287a726d24cc1d558b96c8491d7 Mon Sep 17 00:00:00 2001

From: Mark Charlebois charlebm@gmail.com Date: Fri, 28 Apr 2017 15:15:12 -0700 Subject: fs: compat: Remove warning from COMPATIBLE_IOCTL

From: Mark Charlebois charlebm@gmail.com

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@gmail.com Signed-off-by: Mark Charlebois charlebm@gmail.com Signed-off-by: Behan Webster behanw@converseincode.com Signed-off-by: Matthias Kaehlcke mka@chromium.org Acked-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Al Viro viro@zeniv.linux.org.uk Cc: Nathan Chancellor natechancellor@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- 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@gmail.com are

queue-4.9/fs-compat-remove-warning-from-compatible_ioctl.patch