From 036404183eb3ebff93dea7b572fc718e9d652c7f Mon Sep 17 00:00:00 2001 From: Geliang Tang Date: Thu, 14 Jan 2016 15:20:54 -0800 Subject: mm/ksm.c: use list_for_each_entry_safe Use list_for_each_entry_safe() instead of list_for_each_safe() to simplify the code. Signed-off-by: Geliang Tang Cc: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/ksm.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/mm/ksm.c b/mm/ksm.c index b5cd647daa52..2d162c5625f6 100644 --- a/mm/ksm.c +++ b/mm/ksm.c @@ -740,8 +740,7 @@ static int remove_stable_node(struct stable_node *stable_node) static int remove_all_stable_nodes(void) { - struct stable_node *stable_node; - struct list_head *this, *next; + struct stable_node *stable_node, *next; int nid; int err = 0; @@ -756,8 +755,7 @@ static int remove_all_stable_nodes(void) cond_resched(); } } - list_for_each_safe(this, next, &migrate_nodes) { - stable_node = list_entry(this, struct stable_node, list); + list_for_each_entry_safe(stable_node, next, &migrate_nodes, list) { if (remove_stable_node(stable_node)) err = -EBUSY; cond_resched(); @@ -1583,13 +1581,11 @@ static struct rmap_item *scan_get_next_rmap_item(struct page **page) * so prune them once before each full scan. */ if (!ksm_merge_across_nodes) { - struct stable_node *stable_node; - struct list_head *this, *next; + struct stable_node *stable_node, *next; struct page *page; - list_for_each_safe(this, next, &migrate_nodes) { - stable_node = list_entry(this, - struct stable_node, list); + list_for_each_entry_safe(stable_node, next, + &migrate_nodes, list) { page = get_ksm_page(stable_node, false); if (page) put_page(page); @@ -2012,8 +2008,7 @@ static void wait_while_offlining(void) static void ksm_check_stable_tree(unsigned long start_pfn, unsigned long end_pfn) { - struct stable_node *stable_node; - struct list_head *this, *next; + struct stable_node *stable_node, *next; struct rb_node *node; int nid; @@ -2034,8 +2029,7 @@ static void ksm_check_stable_tree(unsigned long start_pfn, cond_resched(); } } - list_for_each_safe(this, next, &migrate_nodes) { - stable_node = list_entry(this, struct stable_node, list); + list_for_each_entry_safe(stable_node, next, &migrate_nodes, list) { if (stable_node->kpfn >= start_pfn && stable_node->kpfn < end_pfn) remove_node_from_stable_tree(stable_node); -- cgit v1.2.3-59-g8ed1b