linux-kernel - Re: [PATCH 2/2] mtd/maps: uclinux: support Blackfin systems

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Message-ID: <8bd0f97a0905260942m4b574d75oc4f38ee3d8849395@mail.gmail.com>
Date:	Tue, 26 May 2009 12:42:48 -0400
From:	Mike Frysinger <vapier.adi@...il.com>
To:	Paul Mundt <lethal@...ux-sh.org>, linux-kernel@...r.kernel.org,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Greg Ungerer <gerg@...inux.org>, uclinux-dev@...inux.org,
	linux-mtd@...ts.infradead.org
Subject: Re: [PATCH 2/2] mtd/maps: uclinux: support Blackfin systems

On Tue, May 26, 2009 at 07:31, Paul Mundt wrote:
> On Tue, May 26, 2009 at 05:46:31AM -0400, Mike Frysinger wrote:
>> diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
>> index 57699c2..dcb552f 100644
>> --- a/drivers/mtd/maps/uclinux.c
>> +++ b/drivers/mtd/maps/uclinux.c
>> @@ -55,8 +55,13 @@ static int __init uclinux_mtd_init(void)
>>  {
>>       struct mtd_info *mtd;
>>       struct map_info *mapp;
>> +#ifdef CONFIG_BLACKFIN
>> +     extern unsigned long memory_mtd_start;
>> +     unsigned long addr = (unsigned long) memory_mtd_start;
>> +#else
>>       extern char _ebss;
>>       unsigned long addr = (unsigned long) &_ebss;
>> +#endif
>>
>>       mapp = &uclinux_ram_map;
>>       mapp->phys = addr;
>
> NAK.
>
> I know there's no accounting for taste, but it would be nice to at least
> see some minimal amount of effort going in to fixing these things
> sanely rather than just lazily shoving ifdefs in wherever possible.
>
> In this case you should just kill all of that crap off, and have the
> platforms that use this set uclinux_ram_map up themselves, it's already
> a global. Of course you can use _ebss as a default value for
> uclinux_ram_map.phys and just override it in your platform.

i would agree if it were a board-specific issue, but it's an arch
issue, so pushing it to the boards level is wrong.  i can however
replace the addr with a global weak and add a symbol into the Blackfin
arch code to override it.

the structs being global in this file is simply wrong from what i can
tell ... everything in there should be static.  i'll send a patch for
that later on.
-mike
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