Eric Dumazet d986f52124 ipv6: lockless IPV6_MULTICAST_LOOP implementation
Add inet6_{test|set|clear|assign}_bit() helpers.

Note that I am using bits from inet->inet_flags,
this might change in the future if we need more flags.

While solving data-races accessing np->mc_loop,
this patch also allows to implement lockless accesses
to np->mcast_hops in the following patch.

Also constify sk_mc_loop() argument.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2023-09-15 10:33:46 +01:00
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