On Sun, 2021-03-21 at 08:46 +0100, Mike Galbraith wrote:

On Sat, 2021-03-20 at 09:18 +0100, Mike Galbraith wrote:

quoted

On Fri, 2021-03-19 at 23:33 +0100, Sebastian Andrzej Siewior wrote:

quoted

Dear RT folks!

I'm pleased to announce the v5.12-rc3-rt3 patch set.

My little rpi4b is fairly unhappy with 5.12-rt, whereas 5.11-rt works
fine on it.  The below spew is endless, making boot endless.  I turned
it into a WARN_ON_ONCE to see if the thing would finish boot, and
surprisingly, it seems perfectly fine with that bad idea. Having not
the foggiest clue what I'm doing down in arm arch-land, bug is in no
immediate danger :)

Actually, it looks like a defenseless little buglet, and this gripe
simply wants to be disabled for RT.

Or completely removed instead.

It's entirely possible I'm missing something obvious to arm experts,
but I don't _think_ the register read needs protection, leaving me
wondering why arch_faults_on_old_pte() was born with that warning.

	-Mike