The patch titled
stop_machine() now uses hard_irq_disable
has been removed from the -mm tree. Its filename was
stop_machine-now-uses-hard_irq_disable.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
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.
[akpm@xxxxxxxxxxxxxxxxxxxx: build fix]
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Acked-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/stop_machine.c | 4 ++++
1 file changed, 4 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
@@ -8,6 +8,8 @@
#include <linux/sched.h>
#include <linux/stop_machine.h>
#include <linux/syscalls.h>
+#include <linux/interrupt.h>
+
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
@@ -45,6 +47,7 @@ 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 +127,7 @@ 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
-
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