linux-kernel - Re: [PATCH] powerpc/xive: Do not mark xive_request_ipi() as _

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Date:   Mon, 16 Aug 2021 15:04:46 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Nathan Chancellor <nathan@...nel.org>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] powerpc/xive: Do not mark xive_request_ipi() as __init

On Mon, Aug 16, 2021 at 12:06 PM Nathan Chancellor <nathan@...nel.org> wrote:
>
> Compiling ppc64le_defconfig with clang-14 shows a modpost warning:
>
> WARNING: modpost: vmlinux.o(.text+0xa74e0): Section mismatch in
> reference from the function xive_setup_cpu_ipi() to the function
> .init.text:xive_request_ipi()
> The function xive_setup_cpu_ipi() references
> the function __init xive_request_ipi().
> This is often because xive_setup_cpu_ipi lacks a __init
> annotation or the annotation of xive_request_ipi is wrong.
>
> xive_request_ipi() is called from xive_setup_cpu_ipi(), which is not
> __init, so xive_request_ipi() should not be marked __init. Remove the
> attribute so there is no more warning.
>
> Fixes: cbc06f051c52 ("powerpc/xive: Do not skip CPU-less nodes when creating the IPIs")
> Signed-off-by: Nathan Chancellor <nathan@...nel.org>

Thanks for the patch!
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>  arch/powerpc/sysdev/xive/common.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
> index 943fd30095af..8183ca343675 100644
> --- a/arch/powerpc/sysdev/xive/common.c
> +++ b/arch/powerpc/sysdev/xive/common.c
> @@ -1170,7 +1170,7 @@ static int __init xive_init_ipis(void)
>         return ret;
>  }
>
> -static int __init xive_request_ipi(unsigned int cpu)
> +static int xive_request_ipi(unsigned int cpu)
>  {
>         struct xive_ipi_desc *xid = &xive_ipis[early_cpu_to_node(cpu)];
>         int ret;
>
> base-commit: a2824f19e6065a0d3735acd9fe7155b104e7edf5
> --
> 2.33.0.rc2
>


-- 
Thanks,
~Nick Desaulniers