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authorJohannes Weiner <hannes@cmpxchg.org>2009-09-21 17:02:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:37 -0700
commit6c0b13519d1c755d874e82c8fb8a6dcef0ee402c (patch)
tree0fe6e6902a488ad6c59ecee971fe64c81edbcce3 /include
parent401a8e1c1670085b8177330ca47d4f7c4ac88761 (diff)
downloadop-kernel-dev-6c0b13519d1c755d874e82c8fb8a6dcef0ee402c.zip
op-kernel-dev-6c0b13519d1c755d874e82c8fb8a6dcef0ee402c.tar.gz
mm: return boolean from page_is_file_cache()
page_is_file_cache() has been used for both boolean checks and LRU arithmetic, which was always a bit weird. Now that page_lru_base_type() exists for LRU arithmetic, make page_is_file_cache() a real predicate function and adjust the boolean-using callsites to drop those pesky double negations. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mm_inline.h8
1 files changed, 2 insertions, 6 deletions
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 99977ff..8835b87 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -5,7 +5,7 @@
* page_is_file_cache - should the page be on a file LRU or anon LRU?
* @page: the page to test
*
- * Returns LRU_FILE if @page is page cache page backed by a regular filesystem,
+ * Returns 1 if @page is page cache page backed by a regular filesystem,
* or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
* Used by functions that manipulate the LRU lists, to sort a page
* onto the right LRU list.
@@ -16,11 +16,7 @@
*/
static inline int page_is_file_cache(struct page *page)
{
- if (PageSwapBacked(page))
- return 0;
-
- /* The page is page cache backed by a normal filesystem. */
- return LRU_FILE;
+ return !PageSwapBacked(page);
}
static inline void
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