From: David S. Miller <davem@davemloft.net>
Date: Fri, 24 Jun 2022 10:34:38 +0000 (+0100)
Subject: Merge branch 'ipmr-remove-rwlocks'
X-Git-Tag: v6.0-rc1~141^2~295
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=23f94f1bc144469efc45370a8be6a73965cf4b68;p=thirdparty%2Flinux.git

Merge branch 'ipmr-remove-rwlocks'

Eric Dumazet says:

====================
ipmr: get rid of rwlocks

We need to get rid of rwlocks in networking stacks,
if read_lock() is (ab)used from softirq context.

As discussed recently [1], rwlock are unfair by design in this case,
and writers can starve and trigger soft lockups.

This series convert ipmr code (both IPv4 and IPv6 families)
to RCU and spinlocks.

[1] https://lkml.org/lkml/2022/6/17/272

v2: fixed two typos, and resent because patch 19/19
    did not make it to patchwork.
====================

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

23f94f1bc144469efc45370a8be6a73965cf4b68