diff options
| author | Bob Liu <lliubbo@gmail.com> | 2010-05-24 14:32:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-25 08:06:57 -0700 |
| commit | 1980050250fa052b1c24a19f9b3d82fae14d77f8 (patch) | |
| tree | 96743238e6941bd7af113ebe9275f6892b374dd3 /mm/mempolicy.c | |
| parent | 6eb27e1fdf5781719a3d2e90e6c89fa012135c62 (diff) | |
| download | lwn-1980050250fa052b1c24a19f9b3d82fae14d77f8.tar.gz lwn-1980050250fa052b1c24a19f9b3d82fae14d77f8.zip | |
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>
Diffstat (limited to 'mm/mempolicy.c')
| -rw-r--r-- | mm/mempolicy.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index d97355b744ab..ac5aeafaec9a 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -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 */ |