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Commit 859f7ef1 authored by Zhihui Zhang's avatar Zhihui Zhang Committed by Linus Torvalds
Browse files

mm/mempolicy.c: remove unnecessary is_valid_nodemask() 



When nodes is true, nsc->mask2 has already been filtered by nsc->mask1,
which has already factored in node_states[N_MEMORY].

Signed-off-by: default avatarZhihui Zhang <zzhsuny@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 44e8967d

mm/mempolicy.c

+2 −8
Original line number Diff line number Diff line
@@ -162,12 +162,6 @@ static const struct mempolicy_operations { 
			enum mpol_rebind_step step);

} mpol_ops[MPOL_MAX];



/* Check that the nodemask contains at least one populated zone */

static int is_valid_nodemask(const nodemask_t *nodemask)

{

	return nodes_intersects(*nodemask, node_states[N_MEMORY]);

}



static inline int mpol_store_user_nodemask(const struct mempolicy *pol)

{

	return pol->flags & MPOL_MODE_FLAGS;
@@ -202,7 +196,7 @@ static int mpol_new_preferred(struct mempolicy *pol, const nodemask_t *nodes) 


static int mpol_new_bind(struct mempolicy *pol, const nodemask_t *nodes)

{

	if (!is_valid_nodemask(nodes))

	if (nodes_empty(*nodes))

		return -EINVAL;

	pol->v.nodes = *nodes;

	return 0;