diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2007-05-10 22:22:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-11 08:29:34 -0700 |
| commit | a12bb44471b819c7f33d8a83044e7116c124e3d5 (patch) | |
| tree | cdf3fee16c535d70659fd343d11b3578941f3596 /kernel | |
| parent | 2d3fbbb391e280724f7f7804ab00ff61cf1b6a4c (diff) | |
| download | lwn-a12bb44471b819c7f33d8a83044e7116c124e3d5.tar.gz lwn-a12bb44471b819c7f33d8a83044e7116c124e3d5.zip | |
stop_machine() now uses hard_irq_disable
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@linux-foundation.org: build fix]
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/stop_machine.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c index daabb74ee0bc..fcee2a8e6da3 100644 --- a/kernel/stop_machine.c +++ b/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; |