commit cf94b62f7005805be0a3ba02c624cb8cd3595bac
author Siddha, Suresh B <suresh.b.siddha@intel.com> Sat Apr 16 15:25:11 2005 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> Sat Apr 16 15:25:11 2005 -0700
tree 97d170a4f4926cb6ac1b904a51e5681056231883
parent 1f2c958ad51fed18b23558e2047b98dfa752e689

[PATCH] x86_64-always-use-cpuid-80000008-to-figure-out-mtrr fix

We need to use the size_and_mask in set_mtrr_var_ranges(which is called
while programming MTRR's for AP's

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/cpu/mtrr/generic.c

diff --git a/arch/i386/kernel/cpu/mtrr/generic.c b/arch/i386/kernel/cpu/mtrr/generic.c
index a4cce45..9f7a7ea 100644
--- a/arch/i386/kernel/cpu/mtrr/generic.c
+++ b/arch/i386/kernel/cpu/mtrr/generic.c
@@ -193,7 +193,8 @@
 
 	rdmsr(MTRRphysBase_MSR(index), lo, hi);
 	if ((vr->base_lo & 0xfffff0ffUL) != (lo & 0xfffff0ffUL)
-	    || (vr->base_hi & 0xfUL) != (hi & 0xfUL)) {
+	    || (vr->base_hi & (size_and_mask >> (32 - PAGE_SHIFT))) !=
+		(hi & (size_and_mask >> (32 - PAGE_SHIFT)))) {
 		mtrr_wrmsr(MTRRphysBase_MSR(index), vr->base_lo, vr->base_hi);
 		changed = TRUE;
 	}
@@ -201,7 +202,8 @@
 	rdmsr(MTRRphysMask_MSR(index), lo, hi);
 
 	if ((vr->mask_lo & 0xfffff800UL) != (lo & 0xfffff800UL)
-	    || (vr->mask_hi & 0xfUL) != (hi & 0xfUL)) {
+	    || (vr->mask_hi & (size_and_mask >> (32 - PAGE_SHIFT))) !=
+		(hi & (size_and_mask >> (32 - PAGE_SHIFT)))) {
 		mtrr_wrmsr(MTRRphysMask_MSR(index), vr->mask_lo, vr->mask_hi);
 		changed = TRUE;
 	}