linux-kernel - Re: [patch 2/3] x86: apic - simplify lapic_get

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Date:	Wed, 24 Sep 2008 23:18:10 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
Cc:	mingo@...e.hu, macro@...ux-mips.org, yhlu.kernel@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 2/3] x86: apic - simplify lapic_get_maxlvt

[Hiroshi Shimamoto - Wed, Sep 24, 2008 at 11:58:12AM -0700]
| Cyrill Gorcunov wrote:
| > Lets use lapic_get_version helper and hide
| > register being read. Also it allow us to
| > make code a bit tighter.
| > 
| > Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
| > ---
| > 
| > Index: linux-2.6.git/arch/x86/kernel/apic.c
| > ===================================================================
| > --- linux-2.6.git.orig/arch/x86/kernel/apic.c	2008-09-24 19:17:20.000000000 +0400
| > +++ linux-2.6.git/arch/x86/kernel/apic.c	2008-09-24 19:33:31.000000000 +0400
| > @@ -309,14 +309,14 @@ int get_physical_broadcast(void)
| >   */
| >  int lapic_get_maxlvt(void)
| >  {
| > -	unsigned int v;
| > +	unsigned int ver;
| >  
| > -	v = apic_read(APIC_LVR);
| > +	ver = lapic_get_version();
| >  	/*
| >  	 * - we always have APIC integrated on 64bit mode
| >  	 * - 82489DXs do not report # of LVT entries
| >  	 */
| > -	return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
| > +	return APIC_INTEGRATED(ver) ? GET_APIC_MAXLVT(ver) : 2;
|                                                       ^^^
| Hi, is this correct?
| Does ver have the full content of apic_read(APIC_LVR)?
| 
| thanks,
| Hiroshi Shimamoto
| 

Hi Hiroshi,

damn, it seems I made a mistake again!
Thanks a lot, Hiroshi! Checking now!
Somehow missed this.

		- Cyrill -
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