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>
diff --git a/mm/migrate.c b/mm/migrate.c
index b535a2c..e97e513 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -68,7 +68,7 @@
list_for_each_entry_safe(page, page2, l, lru) {
list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
- !!page_is_file_cache(page));
+ page_is_file_cache(page));
putback_lru_page(page);
count++;
}
@@ -701,7 +701,7 @@
*/
list_del(&page->lru);
dec_zone_page_state(page, NR_ISOLATED_ANON +
- !!page_is_file_cache(page));
+ page_is_file_cache(page));
putback_lru_page(page);
}
@@ -751,7 +751,7 @@
local_irq_save(flags);
list_for_each_entry(page, from, lru)
__inc_zone_page_state(page, NR_ISOLATED_ANON +
- !!page_is_file_cache(page));
+ page_is_file_cache(page));
local_irq_restore(flags);
if (!swapwrite)