[PATCH RFC 24/67] MIPS: asm: spinlock: Replace sub instruction with addiu

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sub $reg, imm is not a real MIPS instruction. The assembler replaces
that with 'addi $reg, -imm'. However, addi has been removed from R6,
so we replace the 'sub' instruction with 'addiu' instead.

Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
---
 arch/mips/include/asm/spinlock.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h
index f63b3543c1a4..c82fc0eefbec 100644
--- a/arch/mips/include/asm/spinlock.h
+++ b/arch/mips/include/asm/spinlock.h
@@ -277,7 +277,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
 		do {
 			__asm__ __volatile__(
 			"1:	ll	%1, 0(%2)# arch_read_unlock	\n"
-			"	sub	%1, 1				\n"
+			"	addiu	%1, -1				\n"
 			"	sc	%1, 0(%2)			\n"
 			: "+m" (rw->lock), "=&r" (tmp)
 			: "r" (&rw->lock)
-- 
2.2.0






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