blob: 1084fef230e5df55f94241c9373d95f9182e2fd9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
From 21dbeb828448f788ffb3590cf6706c074bb1048f Mon Sep 17 00:00:00 2001
From: Junxiao Bi <junxiao.bi@oracle.com>
Date: Wed, 27 Jun 2012 17:09:54 +0800
Subject: [PATCH 44/49] 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: Ben Hutchings <ben@decadent.org.uk>
---
include/linux/aio.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/aio.h b/include/linux/aio.h
index 2314ad8..b1a520e 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
--
1.7.10
|
