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[ Upstream commit3e94d54e83] If multiple CPUs are sharing the same hardware queue, it can cause leak in the active queue counter tracking when __blk_mq_tag_busy() is executed simultaneously. Fixes:ee78ec1077("blk-mq: blk_mq_tag_busy is no need to return a value") Signed-off-by: Tian Lan <tian.lan@twosigma.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230522210555.794134-1-tilan7663@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.