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[PATCH] mm: less atomic ops

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In the page release paths, we can be sure that nobody will mess with our
page->flags because the refcount has dropped to 0.  So no need for atomic
operations here.

Signed-off-by: Nick Piggin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:00 -08:00 • committed by Linus Torvalds
commit 674539115c
3 changed files with 5 additions and 3 deletions
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4
mm/swap.c
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@ -215,7 +215,7 @@ void fastcall __page_cache_release(struct page *page)
spin_lock_irqsave(&zone->lru_lock, flags);
BUG_ON(!PageLRU(page));
ClearPageLRU(page);
__ClearPageLRU(page);
del_page_from_lru(zone, page);
spin_unlock_irqrestore(&zone->lru_lock, flags);
}
@ -266,7 +266,7 @@ void release_pages(struct page **pages, int nr, int cold)
spin_lock_irq(&zone->lru_lock);
}
BUG_ON(!PageLRU(page));
ClearPageLRU(page);
__ClearPageLRU(page);
del_page_from_lru(zone, page);
}