From 9eb55b030c4b3227334ee4482402096cd1d1a6fe Mon Sep 17 00:00:00 2001 From: Nikanth Karthikesan Date: Mon, 27 Apr 2009 14:53:54 +0200 Subject: [PATCH] block: catch trying to use more bits than request->cmd_flags has Signed-off-by: Nikanth Karthikesan Signed-off-by: Jens Axboe --- block/blk-core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/blk-core.c b/block/blk-core.c index 1e3b97f0ae6e..394c5bd81271 100644 --- 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");