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block: catch trying to use more bits than request->cmd_flags has
author
Nikanth Karthikesan
<knikanth@suse.de>
Mon, 27 Apr 2009 12:53:54 +0000
(14:53 +0200)
committer
Jens Axboe
<jens.axboe@oracle.com>
Tue, 28 Apr 2009 05:37:37 +0000
(07:37 +0200)
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
block/blk-core.c
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diff --git
a/block/blk-core.c
b/block/blk-core.c
index
1e3b97f
..
394c5bd
100644
(file)
--- a/
block/blk-core.c
+++ b/
block/blk-core.c
@@
-2097,6
+2097,9
@@
EXPORT_SYMBOL(kblockd_schedule_work);
int __init blk_dev_init(void)
{
+ BUILD_BUG_ON(__REQ_NR_BITS > 8 *
+ sizeof(((struct request *)0)->cmd_flags));
+
kblockd_workqueue = create_workqueue("kblockd");
if (!kblockd_workqueue)
panic("Failed to create kblockd\n");