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authorOleg Nesterov <oleg@redhat.com>2013-09-11 14:20:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:57:00 -0700
commitef0855d334e1e4af7c3e0c42146a8479ea14a5ab (patch)
tree5955b0424bb392e1949acc0ad5066cb461bef867 /mm/mempolicy.c
parentc07303c0af38ffb1e5fd9b5ff37d0798298a7acf (diff)
mm: mempolicy: turn vma_set_policy() into vma_dup_policy()
Simple cleanup. Every user of vma_set_policy() does the same work, this looks a bit annoying imho. And the new trivial helper which does mpol_dup() + vma_set_policy() to simplify the callers. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Rik van Riel <riel@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
-rw-r--r--mm/mempolicy.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 4baf12e534d1..6b1d426731ae 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2065,6 +2065,16 @@ retry_cpuset:
}
EXPORT_SYMBOL(alloc_pages_current);
+int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
+{
+ struct mempolicy *pol = mpol_dup(vma_policy(src));
+
+ if (IS_ERR(pol))
+ return PTR_ERR(pol);
+ dst->vm_policy = pol;
+ return 0;
+}
+
/*
* If mpol_dup() sees current->cpuset == cpuset_being_rebound, then it
* rebinds the mempolicy its copying by calling mpol_rebind_policy()