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| author | Steffen Klassert <steffen.klassert@secunet.com> | 2010-04-29 14:40:10 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-05-03 11:32:11 +0800 |
| commit | e2cb2f1c2ccf19914e941859c07558ba5f8a4610 (patch) | |
| tree | 48abe8d63bb72052da1dd974ebe967a36e9e4af3 /kernel/padata.c | |
| parent | df2071bd081408318d659cd14a9cf6ff23d874c9 (diff) | |
| download | lwn-e2cb2f1c2ccf19914e941859c07558ba5f8a4610.tar.gz lwn-e2cb2f1c2ccf19914e941859c07558ba5f8a4610.zip | |
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.c | 13 |
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); |