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1cd15904b6
Considering all inlining io_submit_sqe() is huge and usually ends up calling some other functions. We decrement @left in io_submit_sqes() just before calling io_submit_sqe() and use it later after the call. Considering how huge io_submit_sqe() is, there is not much hope @left will be treated gracefully by compilers. Decrement it after the call, not only it's easier on register spilling and probably saves stack write/read, but also at least for x64 uses CPU flags set by the dec instead of doing (read/write and tests). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/807f9a276b54ee8ff4e42e2b78721484f1c71743.1649771823.git.asml.silence@gmail.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.