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| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2008-12-18 22:41:31 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-12-19 00:30:16 +0300 |
| commit | 8a7b12f70fb135a1b1d865687de3edcdc780f6d1 (patch) | |
| tree | 149ceb1d8aba6a46e90513275cfdd090c847cc48 /arch/x86/include/asm/pgtable.h | |
| parent | 5899329b19100c0b82dc78e9b21ed8b920c9ffb3 (diff) | |
| download | linux-8a7b12f70fb135a1b1d865687de3edcdc780f6d1.tar.xz | |
x86: PAT: change pgprot_noncached to uc_minus instead of strong uc - v3
Impact: mm behavior change.
Make pgprot_noncached uc_minus instead of strong UC. This will make
pgprot_noncached to be in line with ioremap_nocache() and all the other
APIs that map page uc_minus on uc request.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 7dcd94c29044..6968d4f6be3e 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -158,6 +158,14 @@ #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ #endif +/* + * Macro to mark a page protection value as UC- + */ +#define pgprot_noncached(prot) \ + ((boot_cpu_data.x86 > 3) \ + ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ + : (prot)) + #ifndef __ASSEMBLY__ /* |