linux-kernel - Re: [PATCH] openrisc: Fix conflicting types for _exext and

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Date:   Wed, 13 Dec 2017 15:15:44 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Joel Stanley <joel@....id.au>
Cc:     Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Stafford Horne <shorne@...il.com>,
        openrisc@...ts.librecores.org, linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Petr Mladek <pmladek@...e.com>
Subject: Re: [PATCH] openrisc: Fix conflicting types for _exext and _stext

On (12/13/17 14:12), Joel Stanley wrote:
> The printk tree in linux-next has a patch "symbol lookup: introduce
> dereference_symbol_descriptor()" that includes sections.h in kallsyms.h,
> so arch/openrisc/kernel/traps.c gets a second extern definition for
> _etext and _stext.
> 
> Remove the local definitions and include sections.h directly in
> preparation for the kallsyms.h change.
> 
> This fixes the following (future) build error:
> 
>   CC      arch/openrisc/kernel/traps.o
> arch/openrisc/kernel/traps.c:43:13: error: conflicting types for ‘_etext’
>  extern char _etext, _stext;
>              ^
> In file included from ./arch/openrisc/include/generated/asm/sections.h:1:0,
>                  from ./include/linux/kallsyms.h:15,
>                  from arch/openrisc/kernel/traps.c:35:
> ./include/asm-generic/sections.h:35:32: note: previous declaration of ‘_etext’ was here
>  extern char _text[], _stext[], _etext[];
>                                 ^
> 
> Signed-off-by: Joel Stanley <joel@....id.au>

FWIW, looks good to me,
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>

	-ss

> ---
>  arch/openrisc/kernel/traps.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/openrisc/kernel/traps.c b/arch/openrisc/kernel/traps.c
> index 4085d72fa5ae..5fb6d512502d 100644
> --- a/arch/openrisc/kernel/traps.c
> +++ b/arch/openrisc/kernel/traps.c
> @@ -39,8 +39,7 @@
>  #include <asm/io.h>
>  #include <asm/pgtable.h>
>  #include <asm/unwinder.h>
> -
> -extern char _etext, _stext;
> +#include <asm/sections.h>
>  
>  int kstack_depth_to_print = 0x180;
>  int lwa_flag;
> -- 
> 2.14.1
>