linux-kernel - Re: [PATCH] x86: ioremap mptable -v2

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Message-ID: <49AC459F.10606@kernel.org>
Date:	Mon, 02 Mar 2009 12:46:23 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	"Kevin O'Connor" <kevin@...onnor.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stefan Reinauer <stepan@...esystems.de>,
	linux-kernel@...r.kernel.org, coreboot@...eboot.org
Subject: Re: [PATCH] x86: ioremap mptable -v2

Ingo Molnar wrote:
> * Yinghai Lu <yinghai@...nel.org> wrote:
> 
>> V3: according to Ingo, seperate get_mpc_size()
> 
> No, that was not my suggestion. My suggestion was to separate 
> this whole 'else if' branch:
> 
>>  	} else if (mpf->physptr) {
>> +		struct mpc_table *mpc;
>> +		unsigned long size;
>>  
>> +		size = get_mpc_size(mpf->physptr);
>> +		mpc = early_ioremap(mpf->physptr, size);
>>  		/*
>>  		 * Read the physical hardware table.  Anything here will
>>  		 * override the defaults.
>>  		 */
>> -		if (!smp_read_mpc(phys_to_virt(mpf->physptr), early)) {
>> +		if (!smp_read_mpc(mpc, early)) {
>>  #ifdef CONFIG_X86_LOCAL_APIC
>>  			smp_found_config = 0;
>>  #endif
> 
> ... into a helper function - if that improves the code.
oh, i missed it
> Your patch does early_ioremap, iounmap then ioremap and iounmap - 
> quite pointlessly.
try to get exact mpc size.
> 
> You should resist cleanup suggestions that make the code worse, 
> even if it comes from a maintainer :-)

we could do that later. to make __get_smp_config smaller and readable.

YH
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