linux-kernel - Re: powerpc/32: Add .data..Lubsan_data*/.data..Lubsan

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Message-Id: <433ywq3bcFz9s6w@ozlabs.org>
Date:   Tue, 27 Nov 2018 20:22:19 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Mathieu Malaterre <malat@...ian.org>
Cc:     Mathieu Malaterre <malat@...ian.org>,
        Paul Mackerras <paulus@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: powerpc/32: Add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly

On Wed, 2018-10-31 at 12:31:56 UTC, Mathieu Malaterre wrote:
> When both `CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y` and `CONFIG_UBSAN=y`
> are set, link step typically produce numberous warnings about orphan
> section:
> 
>   + powerpc-linux-gnu-ld -EB -m elf32ppc -Bstatic --orphan-handling=warn --build-id --gc-sections -X -o .tmp_vmlinux1 -T ./arch/powerpc/kernel/vmlinux.lds --who
>   le-archive built-in.a --no-whole-archive --start-group lib/lib.a --end-group
>   powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data393' from `init/main.o' being placed in section `.data..Lubsan_data393'.
>   powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_data394' from `init/main.o' being placed in section `.data..Lubsan_data394'.
>   ...
>   powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_type11' from `init/main.o' being placed in section `.data..Lubsan_type11'.
>   powerpc-linux-gnu-ld: warning: orphan section `.data..Lubsan_type12' from `init/main.o' being placed in section `.data..Lubsan_type12'.
>   ...
> 
> This commit remove those warnings produced at W=1.
> 
> Link: https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg135407.html
> Suggested-by: Nicholas Piggin <npiggin@...il.com>
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/beba24ac59133cb36ecd03f9af9ccb

cheers