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padata: cpu hotplug code should depend on CONFIG_HOTPLUG_CPU 

This patch makes the padata cpu hotplug code dependend on CONFIG_HOTPLUG_CPU.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Klassert 2010-04-29 14:40:10 +02:00 committed by Herbert Xu
parent df2071bd08
commit e2cb2f1c2c
1 changed files with 7 additions and 6 deletions
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13
kernel/padata.c
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@ -570,6 +570,7 @@ void padata_stop(struct padata_instance *pinst)
}
EXPORT_SYMBOL(padata_stop);
#ifdef CONFIG_HOTPLUG_CPU
static int padata_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
@ -621,6 +622,7 @@ static int padata_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
#endif
/*
* padata_alloc - allocate and initialize a padata instance
@ -631,7 +633,6 @@ static int padata_cpu_callback(struct notifier_block *nfb,
struct padata_instance *padata_alloc(const struct cpumask *cpumask,
struct workqueue_struct *wq)
{
int err;
struct padata_instance *pinst;
struct parallel_data *pd;
@ -654,18 +655,16 @@ struct padata_instance *padata_alloc(const struct cpumask *cpumask,
pinst->flags = 0;
#ifdef CONFIG_HOTPLUG_CPU
pinst->cpu_notifier.notifier_call = padata_cpu_callback;
pinst->cpu_notifier.priority = 0;
err = register_hotcpu_notifier(&pinst->cpu_notifier);
if (err)
goto err_free_cpumask;
register_hotcpu_notifier(&pinst->cpu_notifier);
#endif
mutex_init(&pinst->lock);
return pinst;
err_free_cpumask:
free_cpumask_var(pinst->cpumask);
err_free_pd:
padata_free_pd(pd);
err_free_inst:
@ -689,7 +688,9 @@ void padata_free(struct padata_instance *pinst)
while (atomic_read(&pinst->pd->refcnt) != 0)
yield();
#ifdef CONFIG_HOTPLUG_CPU
unregister_hotcpu_notifier(&pinst->cpu_notifier);
#endif
padata_free_pd(pinst->pd);
free_cpumask_var(pinst->cpumask);
kfree(pinst);