linux-kernel - Re: linux-next: build warning after merge of the akpm tree

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Date:   Wed, 9 Dec 2020 21:33:52 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Mathieu Malaterre <malat@...ian.org>,
        Nicholas Piggin <npiggin@...il.com>
Subject: Re: linux-next: build warning after merge of the akpm tree

Hi all,

On Tue, 8 Dec 2020 23:01:57 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> I will try the following patch tomorrow:
> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 8 Dec 2020 22:58:24 +1100
> Subject: [PATCH] powerpc: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly
> 
> Similarly to commit
> 
>   beba24ac5913 ("powerpc/32: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly")
> 
> since CONFIG_UBSAN bits can now be enabled for all*config.
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  arch/powerpc/kernel/vmlinux.lds.S | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
> index 3b4c26e94328..0318ba436f34 100644
> --- a/arch/powerpc/kernel/vmlinux.lds.S
> +++ b/arch/powerpc/kernel/vmlinux.lds.S
> @@ -296,6 +296,10 @@ SECTIONS
>  #else
>  	.data : AT(ADDR(.data) - LOAD_OFFSET) {
>  		DATA_DATA
> +#ifdef CONFIG_UBSAN
> +		*(.data..Lubsan_data*)
> +		*(.data..Lubsan_type*)
> +#endif
>  		*(.data.rel*)
>  		*(.toc1)
>  		*(.branch_lt)
> -- 
> 2.29.2

This got rid of all the warnings.

-- 
Cheers,
Stephen Rothwell

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