[PATCH] hugetlb: add pte_huge() macro

This patch adds a macro pte_huge(pte) for i386/x86_64 which is needed by a
patch later in the series.  Instead of repeating (_PAGE_PRESENT |
_PAGE_PSE), I've added __LARGE_PTE to i386 to match x86_64.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: <linux-mm@kvack.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index c797286b512f..f51fd2c956bb 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -215,11 +215,13 @@ extern unsigned long pg0[];
  * The following only work if pte_present() is true.
  * Undefined behaviour if not..
  */
+#define __LARGE_PTE (_PAGE_PSE | _PAGE_PRESENT)
 static inline int pte_user(pte_t pte)           { return (pte).pte_low & _PAGE_USER; }
 static inline int pte_read(pte_t pte)           { return (pte).pte_low & _PAGE_USER; }
 static inline int pte_dirty(pte_t pte)          { return (pte).pte_low & _PAGE_DIRTY; }
 static inline int pte_young(pte_t pte)          { return (pte).pte_low & _PAGE_ACCESSED; }
 static inline int pte_write(pte_t pte)          { return (pte).pte_low & _PAGE_RW; }
+static inline int pte_huge(pte_t pte)           { return ((pte).pte_low & __LARGE_PTE) == __LARGE_PTE; }
 
 /*
  * The following only works if pte_present() is not true.
@@ -236,7 +238,7 @@ static inline pte_t pte_mkexec(pte_t pte)	{ (pte).pte_low |= _PAGE_USER; return
 static inline pte_t pte_mkdirty(pte_t pte)      { (pte).pte_low |= _PAGE_DIRTY; return pte; }
 static inline pte_t pte_mkyoung(pte_t pte)      { (pte).pte_low |= _PAGE_ACCESSED; return pte; }
 static inline pte_t pte_mkwrite(pte_t pte)      { (pte).pte_low |= _PAGE_RW; return pte; }
-static inline pte_t pte_mkhuge(pte_t pte)       { (pte).pte_low |= _PAGE_PRESENT | _PAGE_PSE; return pte; }
+static inline pte_t pte_mkhuge(pte_t pte)       { (pte).pte_low |= __LARGE_PTE; return pte; }
 
 #ifdef CONFIG_X86_PAE
 # include <asm/pgtable-3level.h>