Patch "m32r: fix endianness constraints" has been added to the 4.14-stable tree
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;a=summary
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 <[email protected]> know about it.
Quoted 1 line
From
c95f121142a41c951fd62683a5574f2a7b37c573Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <[email protected]>
Date: Wed, 15 Nov 2017 17:31:18 -0800
Subject: m32r: fix endianness constraints
From: Geert Uytterhoeven <[email protected]>
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.
--- arch/m32r/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
arch/m32r/Kconfig +2 -2
@@ -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 [email protected] are
queue-4.14/m32r-fix-endianness-constraints.patch