Additional series arising from discussion in bug 212635, RHEL-9 pro-active back port

Ian Kentrequested to merge
raven-au/centos-stream-9:RHEL-52956-kernfs-extra-concurrancy into main

JIRA: https://issues.redhat.com/browse/RHEL-52956

Upstream status: Linus

Following a discussion in Bug 2126350 it was agreed we should also apply an additional series that can help with kernfs contention as we are still struggling with resolving contention problems in kernfs in RHEL-8. Now it's been requested to pro-actively allpy these changes to RHEL-9

There is one missing patch from the RHEL-8 series. It's the one that's takes the definition of the kernfs root structure out of public view and has kABI impact but it has already been applied so is not needed here.

Signed-off-by: Ian Kent ikent@redhat.com

Edited by Ian Kent

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