From 28bd65781c848d95ba6a7f58b5c4b8265a804ec6 Mon Sep 17 00:00:00 2001 From: Minchan Kim Date: Tue, 25 Jan 2011 15:07:26 -0800 Subject: mm: migration: clarify migrate_pages() comment Callers of migrate_pages should putback_lru_pages to return pages isolated to LRU or free list. Now comment is rather confusing. It says caller always have to call it. It is more clear to point out that the caller has to call it if migrate_pages's return value isn't zero. Signed-off-by: Minchan Kim Cc: Christoph Lameter Cc: Andrea Arcangeli Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index 46fe8cc13d67..9f29a3b7aac2 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -888,7 +888,7 @@ out: * are movable anymore because to has become empty * or no retryable pages exist anymore. * Caller should call putback_lru_pages to return pages to the LRU - * or free list. + * or free list only if ret != 0. * * Return: Number of pages not migrated or error code. */ -- cgit v1.2.3