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MIPS: Replace add and sub instructions in relocate_kernel.S with addiu 

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@imgtec.com>
Cc: <stable@vger.kernel.org> # 4.0+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10558/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Cowgill 2015-06-17 17:12:50 +01:00 committed by Ralf Baechle
parent 3aff47c062
commit a4504755e7
1 changed files with 4 additions and 4 deletions
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8
arch/mips/kernel/relocate_kernel.S
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@ -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