提交 9c7b216d 编写于 作者: C Chandra Seetharaman 提交者: Linus Torvalds

[PATCH] cpu hotplug: revert init patch submitted for 2.6.17

In 2.6.17, there was a problem with cpu_notifiers and XFS.  I provided a
band-aid solution to solve that problem.  In the process, i undid all the
changes you both were making to ensure that these notifiers were available
only at init time (unless CONFIG_HOTPLUG_CPU is defined).

We deferred the real fix to 2.6.18.  Here is a set of patches that fixes the
XFS problem cleanly and makes the cpu notifiers available only at init time
(unless CONFIG_HOTPLUG_CPU is defined).

If CONFIG_HOTPLUG_CPU is defined then cpu notifiers are available at run
time.

This patch reverts the notifier_call changes made in 2.6.17
Signed-off-by: NChandra Seetharaman <sekharan@us.ibm.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 6ac12dfe
......@@ -729,7 +729,7 @@ static void __cpuexit cache_remove_dev(struct sys_device * sys_dev)
return;
}
static int cacheinfo_cpu_callback(struct notifier_block *nfb,
static int __cpuinit cacheinfo_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
......
......@@ -959,7 +959,7 @@ remove_palinfo_proc_entries(unsigned int hcpu)
}
}
static int palinfo_cpu_callback(struct notifier_block *nfb,
static int __devinit palinfo_cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
......
......@@ -572,7 +572,7 @@ static struct file_operations salinfo_data_fops = {
};
#ifdef CONFIG_HOTPLUG_CPU
static int
static int __devinit
salinfo_cpu_callback(struct notifier_block *nb, unsigned long action, void *hcpu)
{
unsigned int i, cpu = (unsigned long)hcpu;
......
......@@ -404,7 +404,7 @@ static int __cpuinit cache_remove_dev(struct sys_device * sys_dev)
* When a cpu is hot-plugged, do a check and initiate
* cache kobject if necessary
*/
static int cache_cpu_callback(struct notifier_block *nfb,
static int __cpuinit cache_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
......
......@@ -279,7 +279,7 @@ static void unregister_cpu_online(unsigned int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
static int sysfs_cpu_notify(struct notifier_block *self,
static int __devinit sysfs_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned int)(long)hcpu;
......
......@@ -629,7 +629,7 @@ static __cpuinit void mce_remove_device(unsigned int cpu)
#endif
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
static int
static __cpuinit int
mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
......
......@@ -107,7 +107,7 @@ static int __cpuinit topology_remove_dev(struct sys_device * sys_dev)
return 0;
}
static int topology_cpu_callback(struct notifier_block *nfb,
static int __cpuinit topology_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
......
......@@ -1497,7 +1497,7 @@ int cpufreq_update_policy(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_update_policy);
static int cpufreq_cpu_callback(struct notifier_block *nfb,
static int __cpuinit cpufreq_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
......
......@@ -833,7 +833,7 @@ static void migrate_hrtimers(int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
static int hrtimer_cpu_notify(struct notifier_block *self,
static int __devinit hrtimer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
......
......@@ -299,7 +299,7 @@ void profile_hit(int type, void *__pc)
}
#ifdef CONFIG_HOTPLUG_CPU
static int profile_cpu_callback(struct notifier_block *info,
static int __devinit profile_cpu_callback(struct notifier_block *info,
unsigned long action, void *__cpu)
{
int node, cpu = (unsigned long)__cpu;
......
......@@ -548,7 +548,7 @@ static void __devinit rcu_online_cpu(int cpu)
tasklet_init(&per_cpu(rcu_tasklet, cpu), rcu_process_callbacks, 0UL);
}
static int rcu_cpu_notify(struct notifier_block *self,
static int __devinit rcu_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
......
......@@ -446,7 +446,7 @@ static void takeover_tasklets(unsigned int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
static int cpu_callback(struct notifier_block *nfb,
static int __devinit cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
......
......@@ -104,7 +104,7 @@ static int watchdog(void * __bind_cpu)
/*
* Create/destroy watchdog threads as CPUs come and go:
*/
static int
static int __devinit
cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
......
......@@ -1652,7 +1652,7 @@ static void __devinit migrate_timers(int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
static int timer_cpu_notify(struct notifier_block *self,
static int __devinit timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
......
......@@ -559,7 +559,7 @@ static void take_over_work(struct workqueue_struct *wq, unsigned int cpu)
}
/* We're holding the cpucontrol mutex here */
static int workqueue_cpu_callback(struct notifier_block *nfb,
static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
......
......@@ -2009,7 +2009,7 @@ static inline void free_zone_pagesets(int cpu)
}
}
static int pageset_cpuup_callback(struct notifier_block *nfb,
static int __cpuinit pageset_cpuup_callback(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
{
......
......@@ -1073,7 +1073,7 @@ static inline int cache_free_alien(struct kmem_cache *cachep, void *objp)
#endif
static int cpuup_callback(struct notifier_block *nfb,
static int __devinit cpuup_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
long cpu = (long)hcpu;
......
......@@ -1450,7 +1450,7 @@ unsigned long shrink_all_memory(unsigned long nr_pages)
not required for correctness. So if the last cpu in a node goes
away, we get changed to run anywhere: as the first one comes back,
restore their cpu bindings. */
static int cpu_callback(struct notifier_block *nfb,
static int __devinit cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
pg_data_t *pgdat;
......
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