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Commit 74781387 authored by Steffen Klassert's avatar Steffen Klassert Committed by Herbert Xu
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padata: Allocate the cpumask for the padata instance 



The cpumask of the padata instance was used without allocated.
This caused boot crashes if CONFIG_CPUMASK_OFFSTACK is enabled.
This patch fixes this by doing proper allocation for this cpumask.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 50beceba

kernel/padata.c

+7 −1
Original line number Diff line number Diff line
@@ -642,6 +642,9 @@ struct padata_instance *padata_alloc(const struct cpumask *cpumask, 
	if (!pd)

		goto err_free_inst;



	if (!alloc_cpumask_var(&pinst->cpumask, GFP_KERNEL))

		goto err_free_pd;



	rcu_assign_pointer(pinst->pd, pd);



	pinst->wq = wq;
@@ -654,12 +657,14 @@ struct padata_instance *padata_alloc(const struct cpumask *cpumask, 
	pinst->cpu_notifier.priority = 0;

	err = register_hotcpu_notifier(&pinst->cpu_notifier);

	if (err)

		goto err_free_pd;

		goto err_free_cpumask;



	mutex_init(&pinst->lock);



	return pinst;



err_free_cpumask:

	free_cpumask_var(pinst->cpumask);

err_free_pd:

	padata_free_pd(pd);

err_free_inst:
@@ -685,6 +690,7 @@ void padata_free(struct padata_instance *pinst) 


	unregister_hotcpu_notifier(&pinst->cpu_notifier);

	padata_free_pd(pinst->pd);

	free_cpumask_var(pinst->cpumask);

	kfree(pinst);

}

EXPORT_SYMBOL(padata_free);