From: David S. Miller <davem@davemloft.net>
Date: Fri, 11 Feb 2022 11:44:27 +0000 (+0000)
Subject: Merge branch 'ipv6-loopback'
X-Git-Tag: v5.18-rc1~136^2~373
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/c002496babfd

Merge branch 'ipv6-loopback'

Eric Dumazet says:

====================
ipv6: remove addrconf reliance on loopback

Second patch in this series removes IPv6 requirement about the netns
loopback device being the last device being dismantled.

This was needed because rt6_uncached_list_flush_dev()
and ip6_dst_ifdown() had to switch dst dev to a known
device (loopback).

Instead of loopback, we can use the (hidden) blackhole_netdev
which is also always there.

This will allow future simplfications of netdev_run_to()
and other parts of the stack like default_device_exit_batch().

Last two patches are optimizations for both IP families.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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c002496babfdc82c5b8fbe3f5a3b73201dca2c73