net: ppp: use sk_unattached_filter api
For the ppp driver, there are currently two open-coded BPF filters in use, that is, pass_filter and active_filter. Migrate both to make proper use of sk_unattached_filter_{create,destroy} API so that the actual BPF code is decoupled from direct access, and filters can be jited as a side-effect by the internal filter compiler. Joint work with Alexei Starovoitov. Signed-off-by: NDaniel Borkmann <dborkman@redhat.com> Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com> Cc: Paul Mackerras <paulus@samba.org> Cc: linux-ppp@vger.kernel.org Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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