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authorSteffen Klassert <steffen.klassert@secunet.com>2010-04-29 14:40:10 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2010-05-03 11:32:11 +0800
commite2cb2f1c2ccf19914e941859c07558ba5f8a4610 (patch)
tree48abe8d63bb72052da1dd974ebe967a36e9e4af3 /kernel/padata.c
parentdf2071bd081408318d659cd14a9cf6ff23d874c9 (diff)
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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>
Diffstat (limited to 'kernel/padata.c')
-rw-r--r--kernel/padata.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index 5b44d0fa358e..1209a17b9718 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -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);