Add a call to hard_irq_disable() to stop_machine so that we make sure
IRQs are really disabled and not only lazy-disabled on archs like
powerpc as some users of stop_machine() may rely on that.
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
kernel/stop_machine.c | 2 ++
1 file changed, 2 insertions(+)
Index: linux-cell/kernel/stop_machine.c
===================================================================
--- linux-cell.orig/kernel/stop_machine.c 2007-05-10 14:46:08.000000000 +1000
+++ linux-cell/kernel/stop_machine.c 2007-05-10 14:47:12.000000000 +1000
@@ -45,6 +45,7 @@ static int stopmachine(void *cpu)
if (stopmachine_state == STOPMACHINE_DISABLE_IRQ
&& !irqs_disabled) {
local_irq_disable();
+ hard_irq_disable();
irqs_disabled = 1;
/* Ack: irqs disabled. */
smp_mb(); /* Must read state first. */
@@ -124,6 +125,7 @@ static int stop_machine(void)
/* Make them disable irqs. */
local_irq_disable();
+ hard_irq_disable();
stopmachine_set_state(STOPMACHINE_DISABLE_IRQ);
return 0;
-
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