Hi, This patch series implements RFC7559 style backoff of IPv6 router solicitation requests.
Patches 1 and 2 are minor cleanup and stand on their own. Patch 3 allows a (potentially) infinite number of RS'es to be sent when the rtr_solicits sysctl is set to -1 (this depends on patch 1). Patch 4 is just boilerplate to add a new sysctl for the maximum backoff period. Patch 5 implements the backoff algorithm (and depends on the previous patches). Patches 6 and 7 switch the defaults over to enable this by default. [PATCH v3 1/7] ipv6 addrconf: enable use of proc_dointvec_minmax in [PATCH v3 2/7] ipv6 addrconf: remove addrconf_sysctl_hop_limit() [PATCH v3 3/7] ipv6 addrconf: rtr_solicits == -1 means unlimited [PATCH v3 4/7] ipv6 addrconf: add new sysctl [PATCH v3 5/7] ipv6 addrconf: implement RFC7559 router solicitation [PATCH v3 6/7] ipv6 addrconf: change default [PATCH v3 7/7] ipv6 addrconf: change default MAX_RTR_SOLICITATIONS Changes v2->v3: none Changes v1->v2: avoid 64-bit divisions to fix 32-bit build errors
