linux-kernel - Re: [PATCH -v3 1/2] x86, setup: reorgize the early_console

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Date:	Mon, 02 Aug 2010 12:15:06 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Pekka Enberg <penberg@...helsinki.fi>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -v3 1/2] x86, setup: reorgize the early_console_setup

On 08/02/2010 10:43 AM, Cyrill Gorcunov wrote:
> On Mon, Aug 02, 2010 at 02:17:31AM -0700, Yinghai Lu wrote:
> ...
>> Index: linux-2.6/arch/x86/boot/printf.c
>> ===================================================================
>> --- linux-2.6.orig/arch/x86/boot/printf.c
>> +++ linux-2.6/arch/x86/boot/printf.c
>> @@ -34,7 +34,7 @@ static int skip_atoi(const char **s)
>>  #define SMALL	32		/* Must be 32 == 0x20 */
>>  #define SPECIAL	64		/* 0x */
>>  
>> -#define do_div(n,base) ({ \
>> +#define __do_div(n, base) ({ \
>>  int __res; \
>>  __res = ((unsigned long) n) % (unsigned) base; \
>>  n = ((unsigned long) n) / (unsigned) base; \
>> @@ -83,7 +83,7 @@ static char *number(char *str, long num,
>>  		tmp[i++] = '0';
>>  	else
>>  		while (num != 0)
>> -			tmp[i++] = (digits[do_div(num, base)] | locase);
>> +			tmp[i++] = (digits[__do_div(num, base)] | locase);
> 
> Yinghai, what was wrong with the origin do_div? After inclusion it as "printf.c"
> in another *.c do_div gets clashed?

yes. get clashed if include that printf.c in arch/x86/boot/compressed/misc.c

Yinghai
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