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mempolicy: remove redundant check 

Lee's patch "mempolicy: use MPOL_PREFERRED for system-wide default policy"
has made the MPOL_DEFAULT only used in the memory policy APIs.  So, no
need to check in __mpol_equal also.  Also get rid of mpol_match_intent()
and move its logic directly into __mpol_equal().

Signed-off-by: Bob Liu <lliubbo@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bob Liu 2010-05-24 14:32:01 -07:00 committed by Linus Torvalds
parent 6eb27e1fdf
commit 1980050250
1 changed files with 5 additions and 11 deletions
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16
mm/mempolicy.c
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@ -1787,16 +1787,6 @@ struct mempolicy *__mpol_cond_copy(struct mempolicy *tompol,
return tompol;
}
static int mpol_match_intent(const struct mempolicy *a,
const struct mempolicy *b)
{
if (a->flags != b->flags)
return 0;
if (!mpol_store_user_nodemask(a))
return 1;
return nodes_equal(a->w.user_nodemask, b->w.user_nodemask);
}
/* Slow path of a mempolicy comparison */
int __mpol_equal(struct mempolicy *a, struct mempolicy *b)
{
@ -1804,8 +1794,12 @@ int __mpol_equal(struct mempolicy *a, struct mempolicy *b)
return 0;
if (a->mode != b->mode)
return 0;
if (a->mode != MPOL_DEFAULT && !mpol_match_intent(a, b))
if (a->flags != b->flags)
return 0;
if (mpol_store_user_nodemask(a))
if (!nodes_equal(a->w.user_nodemask, b->w.user_nodemask))
return 0;
switch (a->mode) {
case MPOL_BIND:
/* Fall through */