This is a note to let you know that I've just added the patch titled
powerpc: Fix defconfig choice logic when cross compiling
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:
powerpc-fix-defconfig-choice-logic-when-cross-compiling.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@xxxxxxxxxxxxxxx> know about it.
>From af5cd05de5dd38cf25d14ea4d30ae9b791d2420b Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Date: Thu, 7 Feb 2019 16:16:52 +1100
Subject: powerpc: Fix defconfig choice logic when cross compiling
From: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
commit af5cd05de5dd38cf25d14ea4d30ae9b791d2420b upstream.
Our logic for choosing defconfig doesn't work well in some situations.
For example if you're on a ppc64le machine but you specify a non-empty
CROSS_COMPILE, in order to use a non-default toolchain, then defconfig
will give you ppc64_defconfig (big endian):
$ make CROSS_COMPILE=~/toolchains/gcc-8/bin/powerpc-linux- defconfig
*** Default configuration is based on 'ppc64_defconfig'
This is because we assume that CROSS_COMPILE being set means we
can't be on a ppc machine and rather than checking we just default to
ppc64_defconfig.
We should just ignore CROSS_COMPILE, instead check the machine with
uname and if it's one of ppc, ppc64 or ppc64le then use that
defconfig. If it's none of those then we fall back to ppc64_defconfig.
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Alyssa Ross <hi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/Makefile | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -29,11 +29,10 @@ endif
export CROSS32CC CROSS32AR
-ifeq ($(CROSS_COMPILE),)
-KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
-else
-KBUILD_DEFCONFIG := ppc64_defconfig
-endif
+# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
+# ppc64_defconfig because we have nothing better to go on.
+uname := $(shell uname -m)
+KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
ifeq ($(CONFIG_PPC64),y)
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
Patches currently in stable-queue which might be from mpe@xxxxxxxxxxxxxx are
queue-4.14/powerpc-fix-defconfig-choice-logic-when-cross-compiling.patch
