linux-kernel - [PATCH] mm: kill page_queue

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Message-Id: <20081217202547.FF22.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Wed, 17 Dec 2008 20:27:30 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	kosaki.motohiro@...fujitsu.com
Subject: [PATCH] mm: kill page_queue_congested()


==
Subject: [PATCH] mm: kill page_queue_congested()

page_queue_congested() was introduced at 2002.
but it is unused until now at all.

it can be removed.


Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/swapfile.c |   20 --------------------
 1 file changed, 20 deletions(-)

Index: b/mm/swapfile.c
===================================================================
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1203,26 +1203,6 @@ out:
 	return ret;
 }
 
-#if 0	/* We don't need this yet */
-#include <linux/backing-dev.h>
-int page_queue_congested(struct page *page)
-{
-	struct backing_dev_info *bdi;
-
-	BUG_ON(!PageLocked(page));	/* It pins the swap_info_struct */
-
-	if (PageSwapCache(page)) {
-		swp_entry_t entry = { .val = page_private(page) };
-		struct swap_info_struct *sis;
-
-		sis = get_swap_info_struct(swp_type(entry));
-		bdi = sis->bdev->bd_inode->i_mapping->backing_dev_info;
-	} else
-		bdi = page->mapping->backing_dev_info;
-	return bdi_write_congested(bdi);
-}
-#endif
-
 asmlinkage long sys_swapoff(const char __user * specialfile)
 {
 	struct swap_info_struct * p = NULL;


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