linux-kernel - [GFS2] Remove unused zero_readpage from stuffed

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Message-Id: <1164889137.3752.378.camel@quoit.chygwyn.com>
Date:	Thu, 30 Nov 2006 12:18:57 +0000
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	cluster-devel@...hat.com, linux-kernel@...r.kernel.org
Cc:	Russell Cattelan <cattelan@...hat.com>
Subject: [GFS2] Remove unused zero_readpage from stuffed_readpage [37/70]

>>From 61057c6bb3a3d14cf2bea6ca20dc6d367e1d852e Mon Sep 17 00:00:00 2001
From: Russell Cattelan <cattelan@...hat.com>
Date: Thu, 9 Nov 2006 11:42:33 -0500
Subject: [PATCH] [GFS2] Remove unused zero_readpage from stuffed_readpage

Stuffed files only consist of a maximum of
(gfs2 block size - sizeof(struct gfs2_dinode)) bytes. Since the
gfs2 block size is always less than page size, we will never see
a call to stuffed_readpage for anything other than the first page
in the file.

Signed-off-by: Russell Cattelan <cattelan@...hat.com>
Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>
---
 fs/gfs2/ops_address.c |   20 ++++----------------
 1 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 3822189..2f7ef98 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -156,19 +156,6 @@ out_ignore:
 	return 0;
 }
 
-static int zero_readpage(struct page *page)
-{
-	void *kaddr;
-
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr, 0, PAGE_CACHE_SIZE);
-	kunmap_atomic(kaddr, KM_USER0);
-
-	SetPageUptodate(page);
-
-	return 0;
-}
-
 /**
  * stuffed_readpage - Fill in a Linux page with stuffed file data
  * @ip: the inode
@@ -183,9 +170,7 @@ static int stuffed_readpage(struct gfs2_
 	void *kaddr;
 	int error;
 
-	/* Only the first page of a stuffed file might contain data */
-	if (unlikely(page->index))
-		return zero_readpage(page);
+	BUG_ON(page->index);
 
 	error = gfs2_meta_inode_buffer(ip, &dibh);
 	if (error)
@@ -737,6 +722,9 @@ int gfs2_releasepage(struct page *page, 
 			if (!atomic_read(&aspace->i_writecount))
 				return 0;
 
+			if (!(gfp_mask & __GFP_WAIT))
+				return 0;
+
 			if (time_after_eq(jiffies, t)) {
 				stuck_releasepage(bh);
 				/* should we withdraw here? */
-- 
1.4.1



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