From e13861d822f8f443ca0c020ea8fc2dc01039cd63 Mon Sep 17 00:00:00 2001 From: Minchan Kim Date: Mon, 24 May 2010 14:31:59 -0700 Subject: [PATCH] mm: remove return value of putback_lru_pages() putback_lru_page() never can fail. So it doesn't matter count of "the number of pages put back". In addition, users of this functions don't use return value. Let's remove unnecessary code. Signed-off-by: Minchan Kim Reviewed-by: Rik van Riel Reviewed-by: KOSAKI Motohiro Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/migrate.h | 4 ++-- mm/migrate.c | 7 +------ 2 files changed, 3 insertions(+), 8 deletions(-) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 7f085c9..7a07b17 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -9,7 +9,7 @@ typedef struct page *new_page_t(struct page *, unsigned long private, int **); #ifdef CONFIG_MIGRATION #define PAGE_MIGRATION 1 -extern int putback_lru_pages(struct list_head *l); +extern void putback_lru_pages(struct list_head *l); extern int migrate_page(struct address_space *, struct page *, struct page *); extern int migrate_pages(struct list_head *l, new_page_t x, @@ -25,7 +25,7 @@ extern int migrate_vmas(struct mm_struct *mm, #else #define PAGE_MIGRATION 0 -static inline int putback_lru_pages(struct list_head *l) { return 0; } +static inline void putback_lru_pages(struct list_head *l) {} static inline int migrate_pages(struct list_head *l, new_page_t x, unsigned long private, int offlining) { return -ENOSYS; } diff --git a/mm/migrate.c b/mm/migrate.c index d3f3f7f..5938db5 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -58,23 +58,18 @@ int migrate_prep(void) /* * Add isolated pages on the list back to the LRU under page lock * to avoid leaking evictable pages back onto unevictable list. - * - * returns the number of pages put back. */ -int putback_lru_pages(struct list_head *l) +void putback_lru_pages(struct list_head *l) { struct page *page; struct page *page2; - int count = 0; 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)); putback_lru_page(page); - count++; } - return count; } /* -- 1.8.2.3