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btrfs: use memdup_user()
authorLi Zefan <lizf@cn.fujitsu.com>
Wed, 8 Apr 2009 07:06:54 +0000 (15:06 +0800)
committerAl Viro <viro@zeniv.linux.org.uk>
Tue, 21 Apr 2009 03:02:50 +0000 (23:02 -0400)
Remove open-coded memdup_user().

Note this changes some GFP_NOFS to GFP_KERNEL, since copy_from_user() may
cause pagefault, it's pointless to pass GFP_NOFS to kmalloc().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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