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commit22d6552f82upstream. With the current implementation, phydev cannot be removed: $ ip link add dummy type dummy $ ip link add xfrm1 type xfrm dev dummy if_id 1 $ ip l d dummy kernel:[77938.465445] unregister_netdevice: waiting for dummy to become free. Usage count = 1 Manage it like in ip tunnels, ie just keep the ifindex. Not that the side effect, is that the phydev is now optional. Fixes:f203b76d78("xfrm: Add virtual xfrm interfaces") Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Tested-by: Julien Floret <julien.floret@6wind.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.