linux-kernel - Re: [PATCH] flush_icache_range: Export symbol to fix build errors

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Date:	Mon, 18 Aug 2014 08:59:59 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Max Filippov <jcmvbkbc@...il.com>
Cc:	Pranith Kumar <bobby.prani@...il.com>,
	Vineet Gupta <vgupta@...opsys.com>,
	Steven Miao <realmz6@...il.com>,
	David Howells <dhowells@...hat.com>,
	Richard Kuo <rkuo@...eaurora.org>,
	James Hogan <james.hogan@...tec.com>,
	Chris Metcalf <cmetcalf@...era.com>,
	Chris Zankel <chris@...kel.net>, Noam Camus <noamc@...hip.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Tony Lu <zlu@...era.com>, Kirill Tkhai <tkhai@...dex.ru>,
	open list <linux-kernel@...r.kernel.org>,
	"moderated list:BLACKFIN ARCHITEC..." 
	<adi-buildroot-devel@...ts.sourceforge.net>,
	"open list:QUALCOMM HEXAGON..." <linux-hexagon@...r.kernel.org>,
	"open list:METAG ARCHITECTURE" <linux-metag@...r.kernel.org>,
	"open list:SUPERH" <linux-sh@...r.kernel.org>,
	"open list:TENSILICA XTENSA..." <linux-xtensa@...ux-xtensa.org>
Subject: Re: [PATCH] flush_icache_range: Export symbol to fix build errors

On Mon, Aug 18, 2014 at 8:35 AM, Max Filippov <jcmvbkbc@...il.com> wrote:
> On Mon, Aug 18, 2014 at 8:24 AM, Pranith Kumar <bobby.prani@...il.com> wrote:
>> Fix building errors occuring due to a missing export of flush_icache_range() in
>> architectures missing the export.
>
> Can you be a little more specific here, what build errors?

kisskb.ellerman.id.au/kisskb/buildresult/11677809/

ERROR: "flush_icache_range" [drivers/misc/lkdtm.ko] undefined!

> [...]
>
>> diff --git a/arch/frv/include/asm/cacheflush.h b/arch/frv/include/asm/cacheflush.h
>> index edbac54..07ee4b3 100644
>> --- a/arch/frv/include/asm/cacheflush.h
>> +++ b/arch/frv/include/asm/cacheflush.h
>> @@ -72,6 +72,7 @@ static inline void flush_icache_range(unsigned long start, unsigned long end)
>>  {
>>         frv_cache_wback_inv(start, end);
>>  }
>> +EXPORT_SYMBOL(flush_icache_range);
>
> EXPORT_SYMBOL should not be placed into header file as it defines
> a non-static variable.

Indeed.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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