From 7a608572a282a74978e10fd6cd63090aebe29f5c Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Mon, 17 Jan 2011 14:42:19 -0800
Subject: Revert "mm: batch activate_page() to reduce lock contention"

This reverts commit 744ed1442757767ffede5008bb13e0805085902e.

Chris Mason ended up chasing down some page allocation errors and pages
stuck waiting on the IO scheduler, and was able to narrow it down to two
commits: commit 744ed1442757 ("mm: batch activate_page() to reduce lock
contention") and d8505dee1a87 ("mm: simplify code of swap.c").

This reverts the first of them.

Reported-and-debugged-by: Chris Mason <chris.mason@oracle.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: linux-mm <linux-mm@kvack.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/internal.h | 9 ---------
 1 file changed, 9 deletions(-)

(limited to 'mm/internal.h')

diff --git a/mm/internal.h b/mm/internal.h
index 4c98630f0f7..69488205723 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -39,15 +39,6 @@ static inline void __put_page(struct page *page)
 
 extern unsigned long highest_memmap_pfn;
 
-#ifdef CONFIG_SMP
-extern int putback_active_lru_page(struct zone *zone, struct page *page);
-#else
-static inline int putback_active_lru_page(struct zone *zone, struct page *page)
-{
-	return 0;
-}
-#endif
-
 /*
  * in mm/vmscan.c:
  */
-- 
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