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A more general way to check if MPTCP_PM_ATTR_* exists in 'info' is to use GENL_REQ_ATTR_CHECK(info, MPTCP_PM_ATTR_*) instead of directly reading info->attrs[MPTCP_PM_ATTR_*] and then checking if it's NULL. So this patch uses GENL_REQ_ATTR_CHECK() for userspace PM in mptcp_pm_nl_announce_doit(), mptcp_pm_nl_remove_doit(), mptcp_pm_nl_subflow_create_doit(), mptcp_pm_nl_subflow_destroy_doit() and mptcp_userspace_pm_get_sock(). Suggested-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: Paolo Abeni <pabeni@redhat.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 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.