The patch titled
stop_machine() now uses hard_irq_disable
has been added to the -mm tree. Its filename is
stop_machine-now-uses-hard_irq_disable.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: stop_machine() now uses hard_irq_disable
From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
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 <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/stop_machine.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN kernel/stop_machine.c~stop_machine-now-uses-hard_irq_disable kernel/stop_machine.c
--- a/kernel/stop_machine.c~stop_machine-now-uses-hard_irq_disable
+++ a/kernel/stop_machine.c
@@ -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;
_
Patches currently in -mm which might be from benh@xxxxxxxxxxxxxxxxxxx are
origin.patch
do-not-select-macintosh-drivers-by-default.patch
introduce-freezer-flags-rev-2.patch
powerpc-fixup-hard_irq_disable-semantics.patch
add-hard_irq_disable.patch
stop_machine-now-uses-hard_irq_disable.patch
linux-kernel-markers-powerpc-optimization.patch
linux-kernel-markers-powerpc-optimization-fix.patch
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