aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMark Lord <lkml@rtr.ca>2007-10-01 01:20:10 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-01 07:52:23 -0700
commit4047727e5ae33f9b8d2b7766d1994ea6e5ec2991 (patch)
tree70486b4524e672d800c2fbf36d06c73306efacf6
parent281e0e3b34acb76a157576d27abc85c09fcf78e3 (diff)
downloadlinux-stericsson-4047727e5ae33f9b8d2b7766d1994ea6e5ec2991.tar.gz
Fix SMP poweroff hangs
We need to disable all CPUs other than the boot CPU (usually 0) before attempting to power-off modern SMP machines. This fixes the hang-on-poweroff issue on my MythTV SMP box, and also on Thomas Gleixner's new toybox. Signed-off-by: Mark Lord <mlord@pobox.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/sys.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c
index 1b33b05d346b..8ae2e636eb1b 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -32,6 +32,7 @@
#include <linux/getcpu.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/seccomp.h>
+#include <linux/cpu.h>
#include <linux/compat.h>
#include <linux/syscalls.h>
@@ -878,6 +879,7 @@ void kernel_power_off(void)
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
if (pm_power_off_prepare)
pm_power_off_prepare();
+ disable_nonboot_cpus();
sysdev_shutdown();
printk(KERN_EMERG "Power down.\n");
machine_power_off();