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authorLi Shaohua <shaohua.li@intel.com>2005-06-25 14:54:56 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:30 -0700
commite1367daf3eed5cd619ee88c9907e1e6ddaa58406 (patch)
treedce60efefba356e0a914669587586a6174e41b94 /drivers/base
parent0bb3184df537002a742bafddf3f4fb482b7fe610 (diff)
downloadop-kernel-dev-e1367daf3eed5cd619ee88c9907e1e6ddaa58406.zip
op-kernel-dev-e1367daf3eed5cd619ee88c9907e1e6ddaa58406.tar.gz
[PATCH] cpu state clean after hot remove
Clean CPU states in order to reuse smp boot code for CPU hotplug. Signed-off-by: Li Shaohua<shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/cpu.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 6ef3069..bdd7e9f 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -16,6 +16,10 @@ struct sysdev_class cpu_sysdev_class = {
EXPORT_SYMBOL(cpu_sysdev_class);
#ifdef CONFIG_HOTPLUG_CPU
+#ifndef __HAVE_ARCH_SMP_PREPARE_CPU
+#define smp_prepare_cpu(cpu) (0)
+#endif
+
static ssize_t show_online(struct sys_device *dev, char *buf)
{
struct cpu *cpu = container_of(dev, struct cpu, sysdev);
@@ -36,7 +40,9 @@ static ssize_t store_online(struct sys_device *dev, const char *buf,
kobject_hotplug(&dev->kobj, KOBJ_OFFLINE);
break;
case '1':
- ret = cpu_up(cpu->sysdev.id);
+ ret = smp_prepare_cpu(cpu->sysdev.id);
+ if (ret == 0)
+ ret = cpu_up(cpu->sysdev.id);
break;
default:
ret = -EINVAL;
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