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| author | Yinghai Lu <yinghai@kernel.org> | 2009-11-16 23:04:56 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-11-17 10:26:53 -0800 |
| commit | 508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf (patch) | |
| tree | c16016bae57e594ee8dbbc48f46a9eaf599d9a56 /arch/x86/kernel/cpu | |
| parent | 5bd085b5fbd8b0b8685a2173cb9263798fc2a44e (diff) | |
| download | blackbird-op-linux-508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf.tar.gz blackbird-op-linux-508d85c2c6bc8cba53d2a54d9a306ad64a0a80bf.zip | |
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')
| -rw-r--r-- | arch/x86/kernel/cpu/mtrr/cleanup.c | 2 |
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]++; } |
