This is a note to let you know that I've just added the patch titled
MIPS: Replace add and sub instructions in relocate_kernel.S with addiu
to the 4.1-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:
mips-replace-add-and-sub-instructions-in-relocate_kernel.s-with-addiu.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a4504755e7dc8d43ed2a934397032691cd03adf7 Mon Sep 17 00:00:00 2001
From: James Cowgill <James.Cowgill@xxxxxxxxxx>
Date: Wed, 17 Jun 2015 17:12:50 +0100
Subject: MIPS: Replace add and sub instructions in relocate_kernel.S with addiu
From: James Cowgill <James.Cowgill@xxxxxxxxxx>
commit a4504755e7dc8d43ed2a934397032691cd03adf7 upstream.
Fixes the assembler errors generated when compiling a MIPS R6 kernel with
CONFIG_KEXEC on, by replacing the offending add and sub instructions with
addiu instructions.
Build errors:
arch/mips/kernel/relocate_kernel.S: Assembler messages:
arch/mips/kernel/relocate_kernel.S:27: Error: invalid operands `dadd $16,$16,8'
arch/mips/kernel/relocate_kernel.S:64: Error: invalid operands `dadd $20,$20,8'
arch/mips/kernel/relocate_kernel.S:65: Error: invalid operands `dadd $18,$18,8'
arch/mips/kernel/relocate_kernel.S:66: Error: invalid operands `dsub $22,$22,1'
scripts/Makefile.build:294: recipe for target 'arch/mips/kernel/relocate_kernel.o' failed
Signed-off-by: James Cowgill <James.Cowgill@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/10558/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/relocate_kernel.S | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/arch/mips/kernel/relocate_kernel.S
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -24,7 +24,7 @@ LEAF(relocate_new_kernel)
process_entry:
PTR_L s2, (s0)
- PTR_ADD s0, s0, SZREG
+ PTR_ADDIU s0, s0, SZREG
/*
* In case of a kdump/crash kernel, the indirection page is not
@@ -61,9 +61,9 @@ copy_word:
/* copy page word by word */
REG_L s5, (s2)
REG_S s5, (s4)
- PTR_ADD s4, s4, SZREG
- PTR_ADD s2, s2, SZREG
- LONG_SUB s6, s6, 1
+ PTR_ADDIU s4, s4, SZREG
+ PTR_ADDIU s2, s2, SZREG
+ LONG_ADDIU s6, s6, -1
beq s6, zero, process_entry
b copy_word
b process_entry
Patches currently in stable-queue which might be from James.Cowgill@xxxxxxxxxx are
queue-4.1/mips-replace-add-and-sub-instructions-in-relocate_kernel.s-with-addiu.patch
queue-4.1/mips-unaligned-fix-build-error-on-big-endian-r6-kernels.patch
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