[PATCH] list: use list_replace_init() instead of list_splice_init()
list_splice_init(list, head) does unneeded job if it is known that
list_empty(head) == 1. We can use list_replace_init() instead.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/i386/mm/pageattr.c b/arch/i386/mm/pageattr.c
index 92c3d9f..0887b34 100644
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@@ -209,19 +209,19 @@
}
void global_flush_tlb(void)
-{
- LIST_HEAD(l);
+{
+ struct list_head l;
struct page *pg, *next;
BUG_ON(irqs_disabled());
spin_lock_irq(&cpa_lock);
- list_splice_init(&df_list, &l);
+ list_replace_init(&df_list, &l);
spin_unlock_irq(&cpa_lock);
flush_map();
list_for_each_entry_safe(pg, next, &l, lru)
__free_page(pg);
-}
+}
#ifdef CONFIG_DEBUG_PAGEALLOC
void kernel_map_pages(struct page *page, int numpages, int enable)