On Sat, Feb 02 2013, Tejun Heo wrote:
> idr allocation in blk_alloc_devt() wasn't synchronized against lookup
> and removal, and its limit check was off by one - 1 << MINORBITS is
> the number of minors allowed, not the maximum allowed minor.
> 
> Add locking and rename MAX_EXT_DEVT to NR_EXT_DEVT and fix limit
> checking.
> 
> Signed-off-by: Tejun Heo <t...@kernel.org>
> Cc: Jens Axboe <ax...@kernel.dk>
> Cc: sta...@vger.kernel.org

Acked-by: Jens Axboe <ax...@kernel.dk>

-- 
Jens Axboe

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