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c3718936ec
struct ifacaddr6 are already freed after RCU grace period. Add __rcu qualifier to aca_next pointer, and idev->ac_list Add relevant rcu_assign_pointer() and dereference accessors. ipv6_chk_acast_dev() no longer needs to acquire idev->lock. /proc/net/anycast6 is now purely RCU protected, it no longer acquires idev->lock. Similarly in6_dump_addrs() can use RCU protection to iterate through anycast addresses. It was relying on a mixture of RCU and RTNL but next patches will get rid of RTNL there. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Link: https://lore.kernel.org/r/20240223201054.220534-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>