linux-kernel - [PATCH] x86: amd opteron TOM2 mask val fix

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Message-Id: <200805121740.40070.yhlu.kernel@gmail.com>
Date:	Mon, 12 May 2008 17:40:39 -0700
From:	Yinghai Lu <yhlu.kernel@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: amd opteron TOM2 mask val fix


there is typo with the mask. need to remove that extra 0. to avoid 4bits was cleared.

Signed-off-by: Yinghal Lu <yhlu.kernel@...il.com>

Index: linux-2.6/arch/x86/kernel/cpu/mtrr/generic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/cpu/mtrr/generic.c
+++ linux-2.6/arch/x86/kernel/cpu/mtrr/generic.c
@@ -233,7 +233,7 @@ void __init get_mtrr_state(void)
 		mtrr_tom2 = high;
 		mtrr_tom2 <<= 32;
 		mtrr_tom2 |= low;
-		mtrr_tom2 &= 0xffffff8000000ULL;
+		mtrr_tom2 &= 0xffffff800000ULL;
 	}
 	if (mtrr_show) {
 		int high_width;
Index: linux-2.6/arch/x86/pci/k8-bus_64.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/k8-bus_64.c
+++ linux-2.6/arch/x86/pci/k8-bus_64.c
@@ -384,7 +384,7 @@ static int __init early_fill_mp_bus_info
 	/* need to take out [0, TOM) for RAM*/
 	address = MSR_K8_TOP_MEM1;
 	rdmsrl(address, val);
-	end = (val & 0xffffff8000000ULL);
+	end = (val & 0xffffff800000ULL);
 	printk(KERN_INFO "TOM: %016lx aka %ldM\n", end, end>>20);
 	if (end < (1ULL<<32))
 		update_range(range, 0, end - 1);
@@ -478,7 +478,7 @@ static int __init early_fill_mp_bus_info
 		/* TOP_MEM2 */
 		address = MSR_K8_TOP_MEM2;
 		rdmsrl(address, val);
-		end = (val & 0xffffff8000000ULL);
+		end = (val & 0xffffff800000ULL);
 		printk(KERN_INFO "TOM2: %016lx aka %ldM\n", end, end>>20);
 		update_range(range, 1ULL<<32, end - 1);
 	}
--
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