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authorRafael J. Wysocki <rjw@sisk.pl>2007-03-16 13:38:06 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-16 19:25:03 -0700
commit94985134b7b46848267ed6b734320db01c974e72 (patch)
tree2ed8e5fd6c94a50b4dfb4c899305af04f2e3094d /kernel
parent886c5952950ffed0e8ca3eb9efdc2728bfc144d3 (diff)
downloadlinux-linaro-stable-94985134b7b46848267ed6b734320db01c974e72.tar.gz
[PATCH] swsusp: disable nonboot CPUs before entering platform suspend
Prevent the WARN_ON() in arch/x86_64/kernel/acpi/sleep.c:init_low_mapping() from triggering by disabling nonboot CPUs before we finally enter the platform suspend. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> 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/power/disk.c1
-rw-r--r--kernel/power/user.c3
2 files changed, 3 insertions, 1 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index a200c5fc42ee..873cdf8ea5a4 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -58,6 +58,7 @@ static inline int platform_prepare(void)
static void power_down(suspend_disk_method_t mode)
{
+ disable_nonboot_cpus();
switch(mode) {
case PM_DISK_PLATFORM:
if (pm_ops && pm_ops->enter) {
diff --git a/kernel/power/user.c b/kernel/power/user.c
index dd09efe7df54..d6a8dcc26ae5 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -398,9 +398,10 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
case PMOPS_ENTER:
if (data->platform_suspend) {
+ disable_nonboot_cpus();
kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
error = pm_ops->enter(PM_SUSPEND_DISK);
- error = 0;
+ enable_nonboot_cpus();
}
break;