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mm: return boolean from page_is_file_cache()

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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>
This commit is contained in:
Johannes Weiner
2009-09-21 17:02:59 -07:00
committed by Linus Torvalds
parent 401a8e1c16
commit 6c0b13519d
4 changed files with 7 additions and 11 deletions
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mm/swap.c
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@ -189,7 +189,7 @@ void activate_page(struct page *page)
add_page_to_lru_list(zone, page, lru);
__count_vm_event(PGACTIVATE);
update_page_reclaim_stat(zone, page, !!file, 1);
update_page_reclaim_stat(zone, page, file, 1);
}
spin_unlock_irq(&zone->lru_lock);
}