lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86: mtrr_cleanup: treat WRPROT as UNCACHEABLE

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kernel/cpu/mtrr/main.c
View File

@@ -759,7 +759,8 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
/* take out UC ranges */ /* take out UC ranges */
for (i = 0; i < num_var_ranges; i++) { for (i = 0; i < num_var_ranges; i++) {
type = range_state[i].type; type = range_state[i].type;
if (type != MTRR_TYPE_UNCACHABLE) if (type != MTRR_TYPE_UNCACHABLE &&
type != MTRR_TYPE_WRPROT)
continue; continue;
size = range_state[i].size_pfn; size = range_state[i].size_pfn;
if (!size) if (!size)
@@ -1248,6 +1249,8 @@ static int __init mtrr_cleanup(unsigned address_bits)
continue; continue;
if (!size) if (!size)
type = MTRR_NUM_TYPES; type = MTRR_NUM_TYPES;
if (type == MTRR_TYPE_WRPROT)
type = MTRR_TYPE_UNCACHABLE;
num[type]++; num[type]++;
} }