linux-kernel - [PATCH 6/7] padata: Remove padata_get

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Message-ID: <20100727051927.GO11081@secunet.com>
Date:	Tue, 27 Jul 2010 07:19:27 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Dan Kruchinin <dkruchinin@....org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] padata: Remove padata_get_cpumask

A function that copies the padata cpumasks to a user buffer
is a bit error prone. The cpumask can change any time so we
can't be sure to have the right cpumask when using this function.
A user who is interested in the padata cpumasks should register
to the padata cpumask notifier chain instead. Users of
padata_get_cpumask are already updated, so we can remove it.

Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
 include/linux/padata.h |    2 --
 kernel/padata.c        |   35 -----------------------------------
 2 files changed, 0 insertions(+), 37 deletions(-)

diff --git a/include/linux/padata.h b/include/linux/padata.h
index 43db792..bdcd1e9 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -176,8 +176,6 @@ extern void padata_free(struct padata_instance *pinst);
 extern int padata_do_parallel(struct padata_instance *pinst,
 			      struct padata_priv *padata, int cb_cpu);
 extern void padata_do_serial(struct padata_priv *padata);
-extern int padata_get_cpumask(struct padata_instance *pinst,
-			      int cpumask_type, struct cpumask *out_mask);
 extern int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
 			      cpumask_var_t cpumask);
 extern int padata_set_cpumasks(struct padata_instance *pinst,
diff --git a/kernel/padata.c b/kernel/padata.c
index 1c8c1d1..fd46792 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -589,41 +589,6 @@ static bool padata_validate_cpumask(struct padata_instance *pinst,
 	return true;
 }
 
-/**
- * padata_get_cpumask: Fetch serial or parallel cpumask from the
- *                     given padata instance and copy it to @out_mask
- *
- * @pinst: A pointer to padata instance
- * @cpumask_type: Specifies which cpumask will be copied.
- *                Possible values are PADATA_CPU_SERIAL *or* PADATA_CPU_PARALLEL
- *                corresponding to serial and parallel cpumask respectively.
- * @out_mask: A pointer to cpumask structure where selected
- *            cpumask will be copied.
- */
-int padata_get_cpumask(struct padata_instance *pinst,
-		       int cpumask_type, struct cpumask *out_mask)
-{
-	struct parallel_data *pd;
-	int ret = 0;
-
-	rcu_read_lock_bh();
-	pd = rcu_dereference(pinst->pd);
-	switch (cpumask_type) {
-	case PADATA_CPU_SERIAL:
-		cpumask_copy(out_mask, pd->cpumask.cbcpu);
-		break;
-	case PADATA_CPU_PARALLEL:
-		cpumask_copy(out_mask, pd->cpumask.pcpu);
-		break;
-	default:
-		ret = -EINVAL;
-	}
-
-	rcu_read_unlock_bh();
-	return ret;
-}
-EXPORT_SYMBOL(padata_get_cpumask);
-
 static int __padata_set_cpumasks(struct padata_instance *pinst,
 				 cpumask_var_t pcpumask,
 				 cpumask_var_t cbcpumask)
-- 
1.5.6.5

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