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btrfs: fix wrong allocating flag when reading page
authorItaru Kitayama <kitayama@cl.bb4u.ne.jp>
Mon, 25 Apr 2011 23:43:51 +0000 (19:43 -0400)
committerChris Mason <chris.mason@oracle.com>
Mon, 25 Apr 2011 23:43:51 +0000 (19:43 -0400)
the space cache use extent_readpages() to read free space information,
so we can not use GFP_KERNEL flag to allocate memory, or it may lead
to deadlock.

Signed-off-by: Itaru Kitayama <kitayama@cl.bb4u.ne.jp>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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