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

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Message-ID: <8cc7ebe4-442b-a24b-9bb0-fce6e0425ee6@raspberrypi.com>
Date:   Tue, 7 Jun 2022 09:29:09 +0100
From:   Phil Elwell <phil@...pberrypi.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>, linux@...linux.org.uk,
        rmk+kernel@...linux.org.uk, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, catalin.marinas@....com
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Ard Biesheuvel <ardb@...nel.org>, stable@...r.kernel.org
Subject: Re: [PATCH v2] ARM: initialize jump labels before setup_machine_fdt()

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.

The stable branch may not be living up to its name, but I don't think this is a 
quick fix.

Phil