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authorMiklos Szeredi <mszeredi@suse.cz>2008-04-28 02:12:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:20 -0700
commitac6aadb24b7d4f0e54246732e221c102073412bf (patch)
tree1936c3e847fca977b8c0d650416c66655f7633ad /mm/swap.c
parentf05111f50105ac479a008cf85749cf9c956453ea (diff)
downloadop-kernel-dev-ac6aadb24b7d4f0e54246732e221c102073412bf.zip
op-kernel-dev-ac6aadb24b7d4f0e54246732e221c102073412bf.tar.gz
mm: rotate_reclaimable_page() cleanup
Clean up messy conditional calling of test_clear_page_writeback() from both rotate_reclaimable_page() and end_page_writeback(). The only user of rotate_reclaimable_page() is end_page_writeback() so this is OK. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
-rw-r--r--mm/swap.c37
1 files changed, 12 insertions, 25 deletions
diff --git a/mm/swap.c b/mm/swap.c
index aa1139c..91e1944 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -132,34 +132,21 @@ static void pagevec_move_tail(struct pagevec *pvec)
* Writeback is about to end against a page which has been marked for immediate
* reclaim. If it still appears to be reclaimable, move it to the tail of the
* inactive list.
- *
- * Returns zero if it cleared PG_writeback.
*/
-int rotate_reclaimable_page(struct page *page)
+void rotate_reclaimable_page(struct page *page)
{
- struct pagevec *pvec;
- unsigned long flags;
-
- if (PageLocked(page))
- return 1;
- if (PageDirty(page))
- return 1;
- if (PageActive(page))
- return 1;
- if (!PageLRU(page))
- return 1;
-
- page_cache_get(page);
- local_irq_save(flags);
- pvec = &__get_cpu_var(lru_rotate_pvecs);
- if (!pagevec_add(pvec, page))
- pagevec_move_tail(pvec);
- local_irq_restore(flags);
-
- if (!test_clear_page_writeback(page))
- BUG();
+ if (!PageLocked(page) && !PageDirty(page) && !PageActive(page) &&
+ PageLRU(page)) {
+ struct pagevec *pvec;
+ unsigned long flags;
- return 0;
+ page_cache_get(page);
+ local_irq_save(flags);
+ pvec = &__get_cpu_var(lru_rotate_pvecs);
+ if (!pagevec_add(pvec, page))
+ pagevec_move_tail(pvec);
+ local_irq_restore(flags);
+ }
}
/*
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