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block: catch trying to use more bits than request->cmd_flags has 

Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Nikanth Karthikesan 2009-04-27 14:53:54 +02:00 committed by Jens Axboe
parent c69d48540c
commit 9eb55b030c
1 changed files with 3 additions and 0 deletions
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3
block/blk-core.c
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@ -2097,6 +2097,9 @@ EXPORT_SYMBOL(kblockd_schedule_work);
int __init blk_dev_init(void) int __init blk_dev_init(void)
{ {
BUILD_BUG_ON(__REQ_NR_BITS > 8 *
sizeof(((struct request *)0)->cmd_flags));
kblockd_workqueue = create_workqueue("kblockd"); kblockd_workqueue = create_workqueue("kblockd");
if (!kblockd_workqueue) if (!kblockd_workqueue)
panic("Failed to create kblockd\n"); panic("Failed to create kblockd\n");