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When a tunnel is closed, l2tp_tunnel_closeall closes all sessions in the tunnel. Move the work of deleting each session to the work queue so that sessions are deleted using the same codepath whether they are closed by user API request or their parent tunnel is closing. This also avoids the locking dance in l2tp_tunnel_closeall where the tunnel's session list lock was unlocked and relocked in the loop. In l2tp_exit_net, use drain_workqueue instead of flush_workqueue because the processing of tunnel_delete work may queue session_delete work items which must also be processed. Signed-off-by: James Chapman <jchapman@katalix.com> Signed-off-by: Tom Parkin <tparkin@katalix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.