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x86: mtrr_cleanup: treat WRPROT as UNCACHEABLE

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For the purpose of MTRR canonicalization, treat WRPROT as UNCACHEABLE.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu 2008-10-04 14:50:33 -07:00 committed by H. Peter Anvin
parent 99e1aa17ce
commit dd5523552c
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kernel/cpu/mtrr/main.c
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@ -759,7 +759,8 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
/* take out UC ranges */
for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type;
if (type != MTRR_TYPE_UNCACHABLE)
if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue;
size = range_state[i].size_pfn;
if (!size)
@ -1248,6 +1249,8 @@ static int __init mtrr_cleanup(unsigned address_bits)
continue;
if (!size)
type = MTRR_NUM_TYPES;
if (type == MTRR_TYPE_WRPROT)
type = MTRR_TYPE_UNCACHABLE;
num[type]++;
}