x86: unify paravirt pagetable accessors

Put all the defines for mapping pagetable operations to their native
versions (for the non-paravirt case) into one place.  Make the
corresponding changes to paravirt.h.

The tricky part here is that when a pagetable entry can't be updated
atomically (ie, 32-bit PAE), we need special handlers for pte_clear,
set_pte_atomic and set_pte_present.  However, the other two modes
don't need special handling for these, and can use a common
set_pte(_at) path.

[ mingo@elte.hu: fixes ]

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 16 insertions, 14 deletions

diff --git a/include/asm-x86/pgtable-2level.h b/include/asm-x86/pgtable-2level.h
index 65cdc8f9e3b3..ce486bdbbbb7 100644
--- a/include/asm-x86/pgtable-2level.h
+++ b/include/asm-x86/pgtable-2level.h
@@ -15,29 +15,31 @@ static inline void native_set_pte(pte_t *ptep , pte_t pte)
 {
         *ptep = pte;
 }
-static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
-                                     pte_t *ptep , pte_t pte)
-{
-        native_set_pte(ptep, pte);
-}
+
 static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
 {
         *pmdp = pmd;
 }
-#ifndef CONFIG_PARAVIRT
-#define set_pte(pteptr, pteval)         native_set_pte(pteptr, pteval)
-#define set_pte_at(mm,addr,ptep,pteval) native_set_pte_at(mm, addr, ptep, pteval)
-#define set_pmd(pmdptr, pmdval)         native_set_pmd(pmdptr, pmdval)
-#endif
 
-#define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
-#define set_pte_present(mm,addr,ptep,pteval) set_pte_at(mm,addr,ptep,pteval)
+static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte)
+{
+        native_set_pte(ptep, pte);
+}
+
+static inline void native_set_pte_present(struct mm_struct *mm, unsigned long addr,
+                                          pte_t *ptep, pte_t pte)
+{
+        native_set_pte(ptep, pte);
+}
 
-#define pmd_clear(xp)   do { set_pmd(xp, __pmd(0)); } while (0)
+static inline void native_pmd_clear(pmd_t *pmdp)
+{
+        native_set_pmd(pmdp, __pmd(0));
+}
 
 static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *xp)
 {
-        *xp = __pte(0);
+        *xp = native_make_pte(0);
 }
 
 #ifdef CONFIG_SMP