linux-kernel - [PATCH -tip] x86,apic: Use PAGE

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Message-ID: <20091108155356.GB25940@lenovo>
Date:	Sun, 8 Nov 2009 18:53:56 +0300
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	x86team <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH -tip] x86,apic: Use PAGE_SIZE instead of numbers

The whole page is reserved for IO-APIC fixmap
due to non-cacheable requirement. So lets note
this explicitly instead of playing with numbers.

CC: Yinghai Lu <yinghai@...nel.org>
CC: "Maciej W. Rozycki" <macro@...ux-mips.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
---

Perhaps I miss something and (4 * 1024) have some special
meaning?

 arch/x86/kernel/apic/io_apic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.git/arch/x86/kernel/apic/io_apic.c
=====================================================================
--- linux-2.6.git.orig/arch/x86/kernel/apic/io_apic.c
+++ linux-2.6.git/arch/x86/kernel/apic/io_apic.c
@@ -4144,7 +4144,7 @@ fake_ioapic_page:
 		idx++;
 
 		ioapic_res->start = ioapic_phys;
-		ioapic_res->end = ioapic_phys + (4 * 1024) - 1;
+		ioapic_res->end = ioapic_phys + PAGE_SIZE - 1;
 		ioapic_res++;
 	}
 }
--
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