padata: Rename padata_alloc functions

We rename padata_alloc to padata_alloc_possible because this
function allocates a padata_instance and uses the cpu_possible
mask for parallel and serial workers. Also we rename __padata_alloc
to padata_alloc to avoid to export underlined functions. Underlined
functions are considered to be private to padata. Users are updated
accordingly.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/linux/padata.h b/include/linux/padata.h
index 293ad46..71dfc9d 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -165,10 +165,11 @@
 #define	PADATA_INVALID	4
 };
 
-extern struct padata_instance *padata_alloc(struct workqueue_struct *wq);
-extern struct padata_instance *__padata_alloc(struct workqueue_struct *wq,
-					      const struct cpumask *pcpumask,
-					      const struct cpumask *cbcpumask);
+extern struct padata_instance *padata_alloc_possible(
+					struct workqueue_struct *wq);
+extern struct padata_instance *padata_alloc(struct workqueue_struct *wq,
+					    const struct cpumask *pcpumask,
+					    const struct cpumask *cbcpumask);
 extern void padata_free(struct padata_instance *pinst);
 extern int padata_do_parallel(struct padata_instance *pinst,
 			      struct padata_priv *padata, int cb_cpu);