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mm: mempolicy: turn vma_set_policy() into vma_dup_policy()

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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>
This commit is contained in:
Oleg Nesterov
2013-09-11 14:20:14 -07:00
committed by Linus Torvalds
parent c07303c0af
commit ef0855d334
4 changed files with 25 additions and 20 deletions
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mm/mempolicy.c
+10
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@@ -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()