Fix one more case of computing the return EPC after the registers have

already been modified.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -447,9 +447,9 @@ static inline void simulate_sc(struct pt_regs *regs, unsigned int opcode)
 	preempt_disable();
 
 	if (ll_bit == 0 || ll_task != current) {
+		compute_return_epc(regs);
 		regs->regs[reg] = 0;
 		preempt_enable();
-		compute_return_epc(regs);
 		return;
 	}