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The 'nr_budgets' argument of blk_mq_dispatch_rq_list() is either the number of elements in the 'list' argument or zero. Instead of passing the number of list elements to blk_mq_dispatch_rq_list(), pass a boolean argument that indicates whether or not blk_mq_dispatch_rq_list() should request the block driver for a budget for each request in 'list'. Remove the code for counting list elements from blk_mq_dispatch_rq_list() callers where possible. Remove the code that decrements nr_budgets from blk_mq_dispatch_rq_list() because it is superfluous. Each request that is processed by blk_mq_dispatch_rq_list() is in one of these two states if 'get_budget' is false: * Either the request is on 'list' and the budget for the request has to be released from the error path. * Or the request is not on 'list' and q->mq_ops->queue_rq() has already released the budget (ret != BLK_STS_OK) or q->mq_ops->queue_rq() will release the budget asynchronously (ret == BLK_STS_OK). Cc: Christoph Hellwig <hch@lst.de> Cc: Ming Lei <ming.lei@redhat.com> Cc: John Garry <john.g.garry@oracle.com> Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20250415205134.3650042-1-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
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 reStructuredText 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.