From: David S. Miller <davem@davemloft.net>
Date: Mon, 12 Feb 2024 12:17:03 +0000 (+0000)
Subject: Merge branch 'net-avoid-slow-rcu'
X-Git-Tag: v6.9-rc1~159^2~279
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0f37666d87d2dea42ec21776c3d562b7cbd71612;p=thirdparty%2Flinux.git

Merge branch 'net-avoid-slow-rcu'

Eric Dumazet says:

====================
net: avoid slow rcu synchronizations in cleanup_net()

RTNL is a contended mutex, we prefer to expedite rcu synchronizations
in contexts we hold RTNL.

Similarly, cleanup_net() is a single threaded critical component and
should also use synchronize_rcu_expedited() even when not holding RTNL.

First patch removes a barrier with no clear purpose in ipv6_mc_down()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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0f37666d87d2dea42ec21776c3d562b7cbd71612