From 7920c4d658ff2b0f7b8acf3bd7c700875c2bc163 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Sat, 18 Oct 2008 13:23:10 +0100
Subject: 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>
---
arch/mips/kernel/smp.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 7b59cfb7e602..b79ea7055ec3 100644
--- 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)
--
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