From: Dave Chinner <dchinner@redhat.com>
Date: Tue, 20 Jul 2010 07:54:12 +0000 (+1000)
Subject: xfs: use GFP_NOFS for page cache allocation
X-Git-Tag: v2.6.36-rc1~589^2~13
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=aea1b9532143218f8599ecedbbd6bfbf812385e1;p=users%2Fjedix%2Flinux-maple.git

xfs: use GFP_NOFS for page cache allocation

Avoid a lockdep warning by preventing page cache allocation from
recursing back into the filesystem during memory reclaim.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 225ec0fa65b67..8abbf0532ea12 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1493,8 +1493,8 @@ xfs_vm_write_begin(
 	void			**fsdata)
 {
 	*pagep = NULL;
-	return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
-								xfs_get_blocks);
+	return block_write_begin(file, mapping, pos, len, flags | AOP_FLAG_NOFS,
+				 pagep, fsdata, xfs_get_blocks);
 }
 
 STATIC sector_t