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f58abec23d
Function udp_v4_early_demux() was already declared in 'include/net/udp.h', no need to keep the extern in 'ip_input.c', which may produce the following checkpatch warning: WARNING: externs should be avoided in .c files #45: FILE: net/ipv4/ip_input.c:322: +enum skb_drop_reason udp_v4_early_demux(struct sk_buff *skb); Replace it by including 'net/udp.h'. Do the same for tcp_v4_early_demux(). Signed-off-by: Wang Liang <wangliang74@huawei.com> Link: https://patch.msgid.link/20251025092637.1020960-1-wangliang74@huawei.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 reStructuredText 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.