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These pernet_operations create and destroy net::ipv6.icmp_sk socket, used to send ICMP or error reply. Nobody can dereference the socket to handle a packet before net is initialized, as there is no routing; nobody can do that in parallel with exit, as all of devices are moved to init_net or destroyed and there are no packets it-flight. So, it's possible to mark these pernet_operations as async. The same for ndisc_net_ops and for igmp6_net_ops. The last one also creates and destroys /proc entries. Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. 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.