linux-kernel - Re: [PATCH] acpi: arm64: fix section mismatch warning

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Date:   Wed, 13 Oct 2021 10:02:54 +0100
From:   Lorenzo Pieralisi <lorenzo.pieralisi@....com>
To:     Hanjun Guo <guohanjun@...wei.com>
Cc:     Arnd Bergmann <arnd@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Marc Zyngier <maz@...nel.org>, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] acpi: arm64: fix section mismatch warning

On Tue, Oct 12, 2021 at 03:03:29PM +0800, Hanjun Guo wrote:
> Hi Arnd,
> 
> On 2021/9/27 22:19, Arnd Bergmann wrote:
> > From: Arnd Bergmann <arnd@...db.de>
> > 
> > In a gcc-11 randconfig build I came across this warning:
> > 
> > WARNING: modpost: vmlinux.o(.text.unlikely+0x2c084): Section mismatch in reference from the function next_platform_timer() to the variable .init.data:acpi_gtdt_desc
> > The function next_platform_timer() references
> > the variable __initdata acpi_gtdt_desc.
> > This is often because next_platform_timer lacks a __initdata
> > annotation or the annotation of acpi_gtdt_desc is wrong.
> > 
> > This happens when next_platform_timer() fails to get inlined
> > despite the inline annotation. Adding '__init' solves the issue,
> > and it seems best to remove the 'inline' in the process seems
> > better anyway.
> 
> There was a patch to fix this issue as well [1],
> but not merged yet.
> 
> [1]: https://lore.kernel.org/linux-acpi/7f29a149-e005-f13f-2cc4-a9eb737107e1@huawei.com/T/

My bad, we did not coordinate well - I noticed your Acked-by but as a
rule we should also CC LAKML and Catalin/Will (if they aren't CCed) on
the reply to make sure they can actually see it.

Lorenzo