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[ Upstream commit 4746b36b1abe11ca32987b2d21e1e770deab17cc ] For some reason sctp_poll() generates EPOLLERR if sk->sk_error_queue is not empty but recvmsg() can not drain the error queue yet. This is needed to better support timestamping. I had to export inet_recv_error(), since sctp can be compiled as a module. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Cc: Willem de Bruijn <willemb@google.com> Acked-by: Xin Long <lucien.xin@gmail.com> Link: https://lore.kernel.org/r/20231212145550.3872051-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Stable-dep-of: a562c0a2d651 ("sctp: fix busy polling") Signed-off-by: Sasha Levin <sashal@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.