Commit 51822216 authored Mar 03, 2015 by Markos Chandras Committed by Ralf Baechle Apr 10, 2015

MIPS: asm: spinlock: Fix addiu instruction for R10000_LLSC_WAR case



Commit 5753762c("MIPS: asm: spinlock: Replace "sub" instruction
with "addiu") replaced the "sub" instruction with addiu but it did
not update the immediate value in the R10000_LLSC_WAR case.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Fixes: 5753762c("MIPS: asm: spinlock: Replace "sub" instruction with "addiu"")
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9385/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent f6b39ae6

arch/mips/include/asm/spinlock.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -263,7 +263,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
		if (R10000_LLSC_WAR) {
		__asm__ __volatile__(
		"1: ll %1, %2 # arch_read_unlock \n"
		" addiu %1, 1 \n"
		" addiu %1, -1 \n"
		" sc %1, %0 \n"
		" beqzl %1, 1b \n"
		: "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)

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