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Some distributions, such as centos stream 9, still have a version of coreutils which does not yet support the %Hr and %Lr formats for stat(1) [1, 2]. Running ublk selftests on these distributions results in the following error in tests that use the _get_disk_dev_t helper: line 23: ?r: syntax error: operand expected (error token is "?r") To better accommodate older distributions, rewrite _get_disk_dev_t to use the much older %t and %T formats for stat instead. [1] https://github.com/coreutils/coreutils/blob/v9.0/NEWS#L114 [2] https://pkgs.org/download/coreutils Signed-off-by: Uday Shankar <ushankar@purestorage.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250423-ublk_selftests-v1-2-7d060e260e76@purestorage.com 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.