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Maciej Fijalkowski says: ==================== Hi! This small set can be considered as a followup after recent addition of support for tailcalls in bpf subprograms and is focused on optimizing x64 JIT prologue and epilogue sections. Turns out the popping tail call counter is not needed anymore and %rsp handling when stack depth is 0 can be skipped. For longer explanations, please see commit messages. Thank you, Maciej ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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.