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Date:   Tue, 23 Feb 2021 11:36:41 +0000
To:     Thomas Bogendoerfer <tsbogend@alpha.franken.de>
From:   Alexander Lobakin <alobakin@pm.me>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Sami Tolvanen <samitolvanen@google.com>,
        Huacai Chen <chenhuacai@kernel.org>,
        Pei Huang <huangpei@loongson.cn>,
        Kees Cook <keescook@chromium.org>,
        Alexander Lobakin <alobakin@pm.me>,
        Fangrui Song <maskray@google.com>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Corey Minyard <cminyard@mvista.com>,
        kernel test robot <lkp@intel.com>,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arch@vger.kernel.org
Reply-To: Alexander Lobakin <alobakin@pm.me>
Subject: Re: [PATCH mips-fixes] vmlinux.lds.h: catch even more instrumentation symbols into .data
Message-ID: <20210223113600.7009-2-alobakin@pm.me>
In-Reply-To: <20210223113600.7009-1-alobakin@pm.me>
References: <20210223113600.7009-1-alobakin@pm.me>
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> LKP caught another bunch of orphaned instrumentation symbols [0]:
>
> mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
> `init/main.o' being placed in section `.data.$LPBX1'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
> `init/main.o' being placed in section `.data.$LPBX0'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
> `init/do_mounts.o' being placed in section `.data.$LPBX1'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
> `init/do_mounts.o' being placed in section `.data.$LPBX0'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
> `init/do_mounts_initrd.o' being placed in section `.data.$LPBX1'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
> `init/do_mounts_initrd.o' being placed in section `.data.$LPBX0'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
> `init/initramfs.o' being placed in section `.data.$LPBX1'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
> `init/initramfs.o' being placed in section `.data.$LPBX0'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX1' from
> `init/calibrate.o' being placed in section `.data.$LPBX1'
> mipsel-linux-ld: warning: orphan section `.data.$LPBX0' from
> `init/calibrate.o' being placed in section `.data.$LPBX0'
>
> [...]
>
> Soften the wildcard to .data.$L* to grab these ones into .data too.
>
> [0] https://lore.kernel.org/lkml/202102231519.lWPLPveV-lkp@intel.com
>
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Alexander Lobakin <alobakin@pm.me>
> ---
>  include/asm-generic/vmlinux.lds.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Hi Thomas,

This applies on top of mips-next or Linus' tree, so you may need to
rebase mips-fixes before taking it.
It's not for mips-next as it should go into this cycle as a [hot]fix.
I haven't added any "Fixes:" tag since these warnings is a result
of merging several sets and of certain build configurations that
almost couldn't be tested separately.

> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmli=
nux.lds.h
> index 01a3fd6a64d2..c887ac36c1b4 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -95,7 +95,7 @@
>   */
>  #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
>  #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
> -#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundlit=
eral* .data.$__unnamed_* .data.$Lubsan_*
> +#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundlit=
eral* .data.$__unnamed_* .data.$L*
>  #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
>  #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
>  #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* .bss..compoundliteral*
> --
> 2.30.1

Thanks,
Al