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48533eca60
Exit early if the list is empty. Some applications using TCP zerocopy are calling recvmsg( ... MSG_ERRQUEUE) and hit this case quite often, probably because busy polling only deals with sk_receive_queue. Signed-off-by: Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20231005114504.642589-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@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.