From: Junxiao Bi <junxiao.bi@oracle.com>
Date: Wed, 27 Jun 2012 09:09:54 +0000 (+0800)
Subject: aio: make kiocb->private NUll in init_sync_kiocb()
X-Git-Tag: v3.5-rc6~8^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2dfd06036ba7ae8e7be2daf5a2fff1dac42390bf;p=pandora-kernel.git

aio: make kiocb->private NUll in init_sync_kiocb()

Ocfs2 uses kiocb.*private as a flag of unsigned long size. In
commit a11f7e6 ocfs2: serialize unaligned aio, the unaligned
io flag is involved in it to serialize the unaligned aio. As
*private is not initialized in init_sync_kiocb() of do_sync_write(),
this unaligned io flag may be unexpectly set in an aligned dio.
And this will cause OCFS2_I(inode)->ip_unaligned_aio decreased
to -1 in ocfs2_dio_end_io(), thus the following unaligned dio
will hang forever at ocfs2_aiodio_wait() in ocfs2_file_aio_write().

Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: stable@vger.kernel.org
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
---

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