linux-kernel - Re: [PATCH v2] ARM: initialize jump labels before setup_machine

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Message-ID: <CAHmME9o6R2RRdwzB9f+464xH+Aw-9wx2dm=ZsQYFbTk_-66yJw@mail.gmail.com>
Date:   Tue, 7 Jun 2022 10:43:12 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Phil Elwell <phil@...pberrypi.com>
Cc:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Russell King <rmk+kernel@...linux.org.uk>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Stephen Boyd <swboyd@...omium.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH v2] ARM: initialize jump labels before setup_machine_fdt()

Hi Phil,

On Tue, Jun 7, 2022 at 10:29 AM Phil Elwell <phil@...pberrypi.com> wrote:
>
> This patch is fatal for me in the downstream Raspberry Pi kernel - it locks up
> on boot even before the earlycon output is available. Hacking jump_label_init to
> skip the jump_entry for "crng_is_ready" allows it to boot, but is likely to have
> consequences further down the line.

Also, reading this a few times, I'm not 100% sure I understand what
you did to hack around this and why that works. Think you could paste
your hackpatch just out of interest to the discussion (but obviously
not to be applied)?

Jason