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Currently, the block debugfs attributes (tags, tags_bitmap, sched_tags, and sched_tags_bitmap) are protected using q->sysfs_lock. However, these attributes are updated in multiple scenarios: - During driver probe method - During an elevator switch/update - During an nr_hw_queues update - When writing to the sysfs attribute nr_requests All these update paths (except driver probe method, which doesn't require any protection) are already protected using q->elevator_lock. To ensure consistency and proper synchronization, replace q->sysfs_lock with q->elevator_lock for protecting these debugfs attributes. Signed-off-by: Nilay Shroff <nilay@linux.ibm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20250313115235.3707600-2-nilay@linux.ibm.com [axboe: some commit message rewording/fixes] 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.