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| author | Gavin Shan <shangw@linux.vnet.ibm.com> | 2012-12-18 23:21:32 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-19 00:02:12 +0100 |
| commit | 0bb2c7637ef0db4f44528698fa725179fb4917ad (patch) | |
| tree | 5bc0fdbd68805f8cc4a2b2c44a9d48ade1e59685 /usr | |
| parent | drivers/message/fusion/mptscsih.c: missing break (diff) | |
| download | linux-0bb2c7637ef0db4f44528698fa725179fb4917ad.tar.xz linux-0bb2c7637ef0db4f44528698fa725179fb4917ad.zip | |
mm/page_alloc.c: remove duplicate check
While allocating pages using buddy allocator, the compound page is
probably split up to free pages. Under these circumstances, the compound
page should be destroyed by destroy_compound_page(). However, there is a
duplicate check to judge if the page is compound.
Remove the duplicate check since the compound_order() returns 0 when the
page doesn't have PG_head set in destroy_compound_page(). That is to say,
destroy_compound_page() needn't check PageHead().
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions