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authorYinghai Lu <yinghai@kernel.org>2009-11-16 23:04:56 -0800
committerH. Peter Anvin <hpa@zytor.com>2009-11-17 10:26:53 -0800
commit508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf (patch)
treec16016bae57e594ee8dbbc48f46a9eaf599d9a56 /arch/x86/kernel/cpu/mtrr
parent5bd085b5fbd8b0b8685a2173cb9263798fc2a44e (diff)
downloadlinux-508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf.tar.bz2
x86: When cleaning MTRRs, do not fold WP into UC
The current MTRR code treats WP as a form of UC. This really isn't desirable behaviour, except possibly in the case of severe MTRR shortage. Disable this, to allow legitimate uses of WP to remain unmolested. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/cpu/mtrr')
-rw-r--r--arch/x86/kernel/cpu/mtrr/cleanup.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 315738c74aad..6e49f6f91f31 100644
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -689,8 +689,6 @@ static int __init mtrr_need_cleanup(void)
continue;
if (!size)
type = MTRR_NUM_TYPES;
- if (type == MTRR_TYPE_WRPROT)
- type = MTRR_TYPE_UNCACHABLE;
num[type]++;
}