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authorJunxiao Bi <junxiao.bi@oracle.com>2012-06-27 17:09:54 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-07-16 09:04:23 -0700
commitf632881de16f8c3133cd1b0866937f50fa2e9156 (patch)
tree682bbb4fe7e2ec7d9f9302a13e816818a05430a1 /include
parentf838956ac64e227e682d7d4da9883888b9aab381 (diff)
aio: make kiocb->private NUll in init_sync_kiocb()
commit 2dfd06036ba7ae8e7be2daf5a2fff1dac42390bf upstream. 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> Acked-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Joel Becker <jlbec@evilplan.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/aio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/aio.h b/include/linux/aio.h
index 2314ad8b3c9c..b1a520ec8b59 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -140,6 +140,7 @@ struct kiocb {
(x)->ki_dtor = NULL; \
(x)->ki_obj.tsk = tsk; \
(x)->ki_user_data = 0; \
+ (x)->private = NULL; \
} while (0)
#define AIO_RING_MAGIC 0xa10a10a1