linux-kernel - [PATCH 6/13] gfs2: use zero_user

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Date:	Tue, 10 Apr 2007 20:36:00 -0700
From:	Nate Diller <nate.diller@...il.com>
To:	Andrew Morton <akpm@...l.org>,
	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 6/13] gfs2: use zero_user_page

Use zero_user_page() instead of open-coding it. 

Signed-off-by: Nate Diller <nate.diller@...il.com>

--- 

diff -urpN -X dontdiff linux-2.6.21-rc6-mm1/fs/gfs2/bmap.c linux-2.6.21-rc6-mm1-test/fs/gfs2/bmap.c
--- linux-2.6.21-rc6-mm1/fs/gfs2/bmap.c	2007-04-09 17:23:48.000000000 -0700
+++ linux-2.6.21-rc6-mm1-test/fs/gfs2/bmap.c	2007-04-09 18:18:23.000000000 -0700
@@ -885,7 +885,6 @@ static int gfs2_block_truncate_page(stru
 	unsigned blocksize, iblock, length, pos;
 	struct buffer_head *bh;
 	struct page *page;
-	void *kaddr;
 	int err;
 
 	page = grab_cache_page(mapping, index);
@@ -933,10 +932,7 @@ static int gfs2_block_truncate_page(stru
 	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
 		gfs2_trans_add_bh(ip->i_gl, bh, 0);
 
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, length);
 
 unlock:
 	unlock_page(page);
-
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