This is a note to let you know that I've just added the patch titled

m32r: fix endianness constraints

to the 4.14-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: m32r-fix-endianness-constraints.patch and it can be found in the queue-4.14 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 c95f121142a41c951fd62683a5574f2a7b37c573 Mon Sep 17 00:00:00 2001

From: Geert Uytterhoeven geert@linux-m68k.org Date: Wed, 15 Nov 2017 17:31:18 -0800 Subject: m32r: fix endianness constraints

From: Geert Uytterhoeven geert@linux-m68k.org

commit c95f121142a41c951fd62683a5574f2a7b37c573 upstream.

The m32r Kconfig provides both CPU_BIG_ENDIAN and CPU_LITTLE_ENDIAN configuration options. As they are user-selectable and independent, this allows invalid configurations:

- All m32r defconfigs build a big endian kernel, but CPU_BIG_ENDIAN is not set, causing compiler warnings like:

include/linux/byteorder/big_endian.h:7:2: warning: #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN [-Wcpp] #warning inconsistent configuration, needs CONFIG_CPU_BIG_ENDIAN ^

- Since commit 5bdfca6435b82944 ("m32r: define CPU_BIG_ENDIAN"), building an allmodconfig or allyesconfig enables both CONFIG_CPU_BIG_ENDIAN and CONFIG_CPU_LITTLE_ENDIAN. While this did get rid of the warning above, both options are obviously mutually exclusive.

Fix this by making only CPU_LITTLE_ENDIAN configurable by the user, as before, and by making sure exactly one of CPU_BIG_ENDIAN and CPU_LITTLE_ENDIAN is always enabled.

Link: http://lkml.kernel.org/r/1509361505-18150-1-git-send-email-geert@linux-m68k.... Fixes: 5bdfca6435b82944 ("m32r: define CPU_BIG_ENDIAN") Signed-off-by: Geert Uytterhoeven geert@linux-m68k.org Cc: Sudip Mukherjee sudipm.mukherjee@gmail.com Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Cc: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/m32r/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -196,8 +196,8 @@ config TIMER_DIVIDE default "128"

config CPU_BIG_ENDIAN - bool "Generate big endian code" - default n + bool + default !CPU_LITTLE_ENDIAN

config CPU_LITTLE_ENDIAN bool "Generate little endian code"

Patches currently in stable-queue which might be from geert@linux-m68k.org are

queue-4.14/m32r-fix-endianness-constraints.patch