vmscan: delete dead code

`priority' cannot be negative here.  And the comment is obsolete.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
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/vmscan.c b/mm/vmscan.c
index 0c33a09..28b0521 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1956,16 +1956,6 @@ static unsigned long do_try_to_free_pages(struct zonelist *zonelist,
        }
 
 out:
-       /*
-        * Now that we've scanned all the zones at this priority level, note
-        * that level within the zone so that the next thread which performs
-        * scanning of this zone will immediately start out at this priority
-        * level.  This affects only the decision whether or not to bring
-        * mapped pages onto the inactive list.
-        */
-       if (priority < 0)
-               priority = 0;
-
        delayacct_freepages_end();
        put_mems_allowed();