linux-kernel - Re: [PATCH -tip] x86: setup.c fix style problems

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Message-ID: <20090106121802.GA7071@elte.hu>
Date:	Tue, 6 Jan 2009 13:18:02 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>
Cc:	Jaswinder Singh Rajput <jaswinder@...radead.org>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] x86: setup.c fix style problems


* Jaswinder Singh Rajput <jaswinderlinux@...il.com> wrote:

> On Sun, Jan 4, 2009 at 10:51 PM, Ingo Molnar <mingo@...e.hu> wrote:
> >
> > the x86-local declarations in smp.h should probably be moved into a
> > separate smp_x86.h file - to avoid such trouble.
> >
> 
> I think we do not need to make any new files only thing we need is to
> rearrange stuff between existing files.
> 
> Currently there is no such protocol, If we follow this logic then it
> will very easy for us to maintain things:
> 
> CONFIG_SMP -> asm/smp.h
> CONFIG_X86_LOCAL_APIC -> asm/apic.h
> CONFIG_X86_IO_APIC -> asm/io_apic.h

yep.

> And if you want then I will give strict instructions so that we will 
> never face these problems again, like :-
> 
> asm/smp.h:
> 
> #ifndef CONFIG_SMP
> #error "Including wrong file, why you need smp.h for Uniprocessor"
> #else
> ...
> #endif
> 
> Similarly for asm/apic.h and asm/io_apic.h

the smp.h change would work, agreed - but it's not really good for things 
like apic.h and io_apic.h - often apic.h is included to pick up init and 
various callback prototypes - which exist on !CONFIG_X96_IO_APIC too.

	Ingo
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