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2149da0748
I ran into a bug where after hibernation due to incompatible backends, the block driver returned BLK_STS_NOTSUPP, with the current message it's hard to find out what the command flags were. Adding req->cmd_flags help make the problem easier to diagnose. Reviewed-by: Eduardo Valentin <eduval@amazon.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Balbir Singh <sblbir@amzn.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 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.