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| author | Nick Piggin <nickpiggin@yahoo.com.au> | 2006-01-06 00:10:57 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-06 08:33:25 -0800 |
| commit | 92be2e33b155ee76399f51f41fb061f850d02f08 (patch) | |
| tree | 13397157257259eff83729e0286c9a94cfb5a966 /mm | |
| parent | 77a8a78834561398fb4cb1480afa7b0e80b1dd53 (diff) | |
| download | lwn-92be2e33b155ee76399f51f41fb061f850d02f08.tar.gz lwn-92be2e33b155ee76399f51f41fb061f850d02f08.zip | |
[PATCH] mm: microopt conditions
Micro optimise some conditionals where we don't need lazy evaluation.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 6d513faf050b..b0647b515277 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -336,9 +336,9 @@ static inline void __free_pages_bulk (struct page *page, static inline int free_pages_check(const char *function, struct page *page) { - if ( page_mapcount(page) || - page->mapping != NULL || - page_count(page) != 0 || + if (unlikely(page_mapcount(page) | + (page->mapping != NULL) | + (page_count(page) != 0) | (page->flags & ( 1 << PG_lru | 1 << PG_private | @@ -348,7 +348,7 @@ static inline int free_pages_check(const char *function, struct page *page) 1 << PG_slab | 1 << PG_swapcache | 1 << PG_writeback | - 1 << PG_reserved ))) + 1 << PG_reserved )))) bad_page(function, page); if (PageDirty(page)) __ClearPageDirty(page); @@ -458,9 +458,9 @@ expand(struct zone *zone, struct page *page, */ static int prep_new_page(struct page *page, int order) { - if ( page_mapcount(page) || - page->mapping != NULL || - page_count(page) != 0 || + if (unlikely(page_mapcount(page) | + (page->mapping != NULL) | + (page_count(page) != 0) | (page->flags & ( 1 << PG_lru | 1 << PG_private | @@ -471,7 +471,7 @@ static int prep_new_page(struct page *page, int order) 1 << PG_slab | 1 << PG_swapcache | 1 << PG_writeback | - 1 << PG_reserved ))) + 1 << PG_reserved )))) bad_page(__FUNCTION__, page); /* |