l2tp: constify inet6_protocol structures
The inet6_protocol structure is only passed as the first argument to inet6_add_protocol or inet6_del_protocol, both of which are declared as const. Thus the inet6_protocol structure itself can be const. Also drop __read_mostly on the newly const structure. Done with the help of Coccinelle. Signed-off-by:Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
David S. Miller <davem@davemloft.net>
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