linux-kernel - code conditional on non-existing PPC_EARLY_DEBUG

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Date:   Thu, 23 Dec 2021 11:21:03 +0100
From:   Lukas Bulwahn <lukas.bulwahn@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org
Cc:     kernel-janitors <kernel-janitors@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: code conditional on non-existing PPC_EARLY_DEBUG_MICROWATT.

Dear Benjamin, dear Paul, dear Michael,

with commit 48b545b8018d ("powerpc/microwatt: Use standard 16550 UART
for console"), you have some code in arch/powerpc/kernel/udbg_16550.c,
conditional on the Kconfig symbol PPC_EARLY_DEBUG_MICROWATT. However,
since then, the definition of this Kconfig symbol was never introduced
to the mainline repository or current linux-next, nor am I finding any
pending patch for that.

Are you going to add this config definition soon? Or did you identify
that this setup code in udbg_16550.c is not actually needed and can we
simply drop this code again?

This issue was identified with the script ./scripts/checkkconfigsymbols.py.

Best regards,

Lukas