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0c26159352
Add support for adjust_tail. There are no FW changes needed but add a FW capability just in case there would be any issue with previously released FW, or we will have to change the ABI in the future. The helper is trivial and shouldn't be used too often so just inline the body of the function. We add the delta to locally maintained packet length register and check for overflow, since add of negative value must overflow if result is positive. Note that if delta of 0 would be allowed in the kernel this trick stops working and we need one more instruction to compare lengths before and after the change. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.