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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>
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@ -689,8 +689,6 @@ static int __init mtrr_need_cleanup(void)
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continue;
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if (!size)
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type = MTRR_NUM_TYPES;
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if (type == MTRR_TYPE_WRPROT)
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type = MTRR_TYPE_UNCACHABLE;
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num[type]++;
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}
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