Revision - e7e72bf - Remove blkdev warning triggered by using md - origin: https://github.com/torvalds/linux

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Revision e7e72bf641b1fc7b9df6f40bd2c36dfccd8d647c authored by Neil Brown on 14 May 2008, 23:05:54 UTC, committed by Linus Torvalds on 15 May 2008, 02:11:15 UTC

Remove blkdev warning triggered by using md

As setting and clearing queue flags now requires that we hold a spinlock
on the queue, and as blk_queue_stack_limits is called without that lock,
get the lock inside blk_queue_stack_limits.

For blk_queue_stack_limits to be able to find the right lock, each md
personality needs to set q->queue_lock to point to the appropriate lock.
Those personalities which didn't previously use a spin_lock, us
q->__queue_lock.  So always initialise that lock when allocated.

With this in place, setting/clearing of the QUEUE_FLAG_PLUGGED bit will no
longer cause warnings as it will be clear that the proper lock is held.

Thanks to Dan Williams for review and fixing the silly bugs.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Alistair John Strachan <alistair@devzero.co.uk>
Cc: Nick Piggin <npiggin@suse.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Jacek Luczak <difrost.kernel@gmail.com>
Cc: Prakash Punnoor <prakash@punnoor.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Tip revision: e7e72bf641b1fc7b9df6f40bd2c36dfccd8d647c authored by Neil Brown on 14 May 2008, 23:05:54 UTC
Remove blkdev warning triggered by using md

Tip revision: e7e72bf

File	Mode	Size
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arch
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drivers
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include
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ipc
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lib
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net
samples
scripts
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usr
virt
.gitignore	-rw-r--r--	682 bytes
.mailmap	-rw-r--r--	3.6 KB
COPYING	-rw-r--r--	18.3 KB
CREDITS	-rw-r--r--	90.5 KB
Kbuild	-rw-r--r--	2.4 KB
MAINTAINERS	-rw-r--r--	97.3 KB
Makefile	-rw-r--r--	53.7 KB
README	-rw-r--r--	16.5 KB
REPORTING-BUGS	-rw-r--r--	3.1 KB

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Remove blkdev warning triggered by using md

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