MIPS: SMP: Don't reenable interrupts in stop_this_cpu; use WAIT instruction.

Noticed by Anirban Sinha <ASinha@zeugmasystems.com>; patch by me.

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

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 7b59cfb7e6022a21cf90cbd93e8e6a2dfe3a53d3..b79ea7055ec30210a392e348bb19d6a23ddfd174 100644 (file)
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -163,8 +163,10 @@ static void stop_this_cpu(void *dummy)
         * Remove this CPU:
         */
        cpu_clear(smp_processor_id(), cpu_online_map);
-       local_irq_enable();     /* May need to service _machine_restart IPI */
-       for (;;);               /* Wait if available. */
+       for (;;) {
+               if (cpu_wait)
+                       (*cpu_wait)();          /* Wait if available. */
+       }
 }
 
 void smp_send_stop(void)