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Eric Dumazet says:
====================
tcp: address KCSAN reports in tcp_poll() (part I)
This all started with a KCSAN report (included
in "tcp: annotate tp->rcv_nxt lockless reads" changelog)
tcp_poll() runs in a lockless way. This means that about
all accesses of tcp socket fields done in tcp_poll() context
need annotations otherwise KCSAN will complain about data-races.
While doing this detective work, I found a more serious bug,
addressed by the first patch ("tcp: add rcu protection around
tp->fastopen_rsk").
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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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.