c5ed924b54
Simplify and refactor consumer ring functions. The consumer first "peeks" to find descriptors or addresses that are available to read from the ring, then reads them and finally "releases" these descriptors once it is done. The two local variables cons_tail and cons_head are turned into one single variable called cached_cons. cached_tail referred to the cached value of the global consumer pointer and will be stored in cached_cons. For cached_head, we just use cached_prod instead as it was not used for a consumer queue before. It also better reflects what it really is now: a cached copy of the producer pointer. The names of the functions are also renamed in the same manner as the producer functions. The new functions are called xskq_cons_ followed by what it does. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/1576759171-28550-8-git-send-email-magnus.karlsson@intel.com
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.