linux-kernel - Re: [PATCH] wait_on_bit: add an acquire memory barrier

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Message-ID: <CAMj1kXHmXHKG4TXG+e7FgHCB2KKjmSeAdoAVR_bQTjb6NTVD4A@mail.gmail.com>
Date:   Fri, 26 Aug 2022 20:31:31 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Mikulas Patocka <mpatocka@...hat.com>
Cc:     Will Deacon <will@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <parri.andrea@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Akira Yokosawa <akiyks@...il.com>,
        Daniel Lustig <dlustig@...dia.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org
Subject: Re: [PATCH] wait_on_bit: add an acquire memory barrier

On Fri, 26 Aug 2022 at 20:25, Mikulas Patocka <mpatocka@...hat.com> wrote:
>
>
>
> On Fri, 26 Aug 2022, Will Deacon wrote:
>
> > > So, the bad commit is aacd149b62382c63911060b8f64c1e3d89bd405a ("arm64:
> > > head: avoid relocating the kernel twice for KASLR").
> >
> > Thanks. Any chance you could give this a go, please?
> >
> > https://lore.kernel.org/r/20220826164800.2059148-1-ardb@kernel.org
> >
> > Will
>
> This doesn't help.
>

Could you try booting with earlycon?

Just 'earlycon' and if that does not help,
'earlycon=uart8250,mmio32,<uart PA>' [IIRC, mcbin uses 16550
compatible UARTs, right?]