linux-kernel - [PATCH] undo the brd.c part of ramfs-and-ram-disk-pages-are-unevictable.patch

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Date:	Thu, 12 Jun 2008 13:53:53 -0400
From:	Rik van Riel <riel@...hat.com>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Nick Piggin <nickpiggin@...oo.com.au>
Subject: [PATCH] undo the brd.c part of
 ramfs-and-ram-disk-pages-are-unevictable.patch

Undo the brd.c part of ramfs-and-ram-disk-pages-are-unevictable.patch.
The brd pages do not live on the LRU at all, so there is no need to
play these tricks.

Debugged-by: Nick Piggin <nickpiggin@...oo.com.au>
Signed-off-by: Rik van Riel <riel@...hat.com>

---
 drivers/block/brd.c |   13 -------------
 1 file changed, 13 deletions(-)

Index: linux-2.6.26-rc5-mm2/drivers/block/brd.c
===================================================================
--- linux-2.6.26-rc5-mm2.orig/drivers/block/brd.c	2008-06-11 14:39:43.000000000 -0400
+++ linux-2.6.26-rc5-mm2/drivers/block/brd.c	2008-06-12 13:49:18.000000000 -0400
@@ -374,21 +374,8 @@ static int brd_ioctl(struct inode *inode
 	return error;
 }
 
-/*
- * brd_open():
- * Just mark the mapping as containing unevictable pages
- */
-static int brd_open(struct inode *inode, struct file *filp)
-{
-	struct address_space *mapping = inode->i_mapping;
-
-	mapping_set_unevictable(mapping);
-	return 0;
-}
-
 static struct block_device_operations brd_fops = {
 	.owner =		THIS_MODULE,
-	.open  =		brd_open,
 	.ioctl =		brd_ioctl,
 #ifdef CONFIG_BLK_DEV_XIP
 	.direct_access =	brd_direct_access,

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