From: David Ahern <d...@cumulusnetworks.com>
Date: Thu, 9 Jun 2016 10:21:00 -0700
> Frank Kellermann reported a kernel crash with 4.5.0 when IPv6 is
> disabled at boot using the kernel option ipv6.disable=1. Using
> current net-next with the boot option:
>
> $ ip link add red type vrf table 1001
...
> The problem above is due to the fact that the fib hash table is not
> allocated when IPv6 is disabled at boot.
>
> As for the VRF driver it should not do any IPv6 initializations if IPv6
> is disabled, so it needs to know if IPv6 is disabled at boot. The disable
> parameter is private to the IPv6 module, so provide an accessor for
> modules to determine if IPv6 was disabled at boot time.
>
> Fixes: 35402e3136634 ("net: Add IPv6 support to VRF device")
> Signed-off-by: David Ahern <d...@cumulusnetworks.com>
Applied.
