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

microblaze: fix endian handling

to the 4.15-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: microblaze-fix-endian-handling.patch and it can be found in the queue-4.15 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 71e7673dadfdae0605d4c1f66ecb4b045c79fe0f Mon Sep 17 00:00:00 2001

From: Arnd Bergmann arnd@arndb.de Date: Tue, 2 Jan 2018 12:47:19 +0100 Subject: microblaze: fix endian handling

From: Arnd Bergmann arnd@arndb.de

commit 71e7673dadfdae0605d4c1f66ecb4b045c79fe0f upstream.

Building an allmodconfig kernel fails horribly because of endian mismatch. It turns out that the -mlittle-endian switch was not honored at all as we were using the wrong Kconfig symbol and failing to apply CPUFLAGS to the CFLAGS. Finally, the linker flags did not get set right.

This addresses all three of those issues, which now lets me build both big-endian and little-endian kernels for testing.

Fixes: 428dbf156cc5 ("arch: change default endian for microblaze") Fixes: 206d3642d8ee ("arch/microblaze: add choice for endianness and update Makefile") Signed-off-by: Arnd Bergmann arnd@arndb.de Signed-off-by: Michal Simek michal.simek@xilinx.com Cc: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- arch/microblaze/Makefile | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)

--- a/arch/microblaze/Makefile +++ b/arch/microblaze/Makefile @@ -36,16 +36,21 @@ endif CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare -CPUFLAGS-$(CONFIG_BIG_ENDIAN) += -mbig-endian -CPUFLAGS-$(CONFIG_LITTLE_ENDIAN) += -mlittle-endian + +ifdef CONFIG_CPU_BIG_ENDIAN +KBUILD_CFLAGS += -mbig-endian +KBUILD_AFLAGS += -mbig-endian +LD += -EB +else +KBUILD_CFLAGS += -mlittle-endian +KBUILD_AFLAGS += -mlittle-endian +LD += -EL +endif

CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))

# r31 holds current when in kernel mode -KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2) - -LDFLAGS := -LDFLAGS_vmlinux := +KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2)

head-y := arch/microblaze/kernel/head.o libs-y += arch/microblaze/lib/

Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.15/microblaze-fix-endian-handling.patch queue-4.15/x86-oprofile-fix-bogus-gcc-8-warning-in-nmi_setup.patch queue-4.15/cfg80211-fix-cfg80211_beacon_dup.patch queue-4.15/kbuild-always-define-endianess-in-kconfig.h.patch