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authorvenkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>2008-12-18 11:41:32 -0800
committerH. Peter Anvin <hpa@zytor.com>2008-12-18 13:30:16 -0800
commit2520bd3123c00272f818a176c92d03c7d0a113d6 (patch)
tree1c5f3e47243d77573cb4933dadc5224d2fb32686 /include/asm-generic/pgtable.h
parent8a7b12f70fb135a1b1d865687de3edcdc780f6d1 (diff)
x86: PAT: add pgprot_writecombine() interface for drivers - v3
Impact: New mm functionality. Add pgprot_writecombine. pgprot_writecombine will be aliased to pgprot_noncached when not supported by the architecture. 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 'include/asm-generic/pgtable.h')
-rw-r--r--include/asm-generic/pgtable.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index ef87f889ef6..b84633801fb 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -129,6 +129,10 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addres
#define move_pte(pte, prot, old_addr, new_addr) (pte)
#endif
+#ifndef pgprot_writecombine
+#define pgprot_writecombine pgprot_noncached
+#endif
+
/*
* When walking page tables, get the address of the next boundary,
* or the end address of the range if that comes earlier. Although no