mm: remove ptep_establish()

The last user of ptep_establish in mm/ is long gone.  Remove the architecture
primitive as well.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

5 files changed, 26 insertions, 59 deletions

diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index cb4c2c9d00..d2e8171d1d 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -83,14 +83,14 @@
  * means that a write to a clean page will cause a permission fault, and
  * the Linux MM layer will mark the page dirty via handle_pte_fault().
  * For the hardware to notice the permission change, the TLB entry must
- * be flushed, and ptep_establish() does that for us.
+ * be flushed, and ptep_set_access_flags() does that for us.
  *
  * The "accessed" or "young" bit is emulated by a similar method; we only
  * allow accesses to the page if the "young" bit is set.  Accesses to the
  * page will cause a fault, and handle_pte_fault() will set the young bit
  * for us as long as the page is marked present in the corresponding Linux
- * PTE entry.  Again, ptep_establish() will ensure that the TLB is up to
- * date.
+ * PTE entry.  Again, ptep_set_access_flags() will ensure that the TLB is
+ * up to date.
  *
  * However, when the "young" bit is cleared, we deny access to the page
  * by clearing the hardware PTE.  Currently Linux does not flush the TLB
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 7d7bcf990e..aa3f1202a1 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -3,25 +3,6 @@
 
 #ifndef __ASSEMBLY__
 
-#ifndef __HAVE_ARCH_PTEP_ESTABLISH
-/*
- * Establish a new mapping:
- *  - flush the old one
- *  - update the page tables
- *  - inform the TLB about the new one
- *
- * We hold the mm semaphore for reading, and the pte lock.
- *
- * Note: the old pte is known to not be writable, so we don't need to
- * worry about dirty bits etc getting lost.
- */
-#define ptep_establish(__vma, __address, __ptep, __entry)               \
-do {                                                                    \
-        set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry);       \
-        flush_tlb_page(__vma, __address);                               \
-} while (0)
-#endif
-
 #ifndef __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 /*
  * Largely same as above, but only sets the access flags (dirty,
diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index 01734e05e6..afb1597ec1 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -311,17 +311,6 @@ static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
         __ret;                                                          \
 })
 
-/*
- * Rules for using ptep_establish: the pte MUST be a user pte, and
- * must be a present->present transition.
- */
-#define __HAVE_ARCH_PTEP_ESTABLISH
-#define ptep_establish(vma, address, ptep, pteval)                      \
-do {                                                                    \
-        set_pte_present((vma)->vm_mm, address, ptep, pteval);           \
-        flush_tlb_page(vma, address);                                   \
-} while (0)
-
 #define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
 #define ptep_clear_flush_dirty(vma, address, ptep)                      \
 ({                                                                      \
diff --git a/include/asm-ia64/pgtable.h b/include/asm-ia64/pgtable.h
index f923d811c4..47642e06b9 100644
--- a/include/asm-ia64/pgtable.h
+++ b/include/asm-ia64/pgtable.h
@@ -543,8 +543,10 @@ extern void lazy_mmu_prot_update (pte_t pte);
 # define ptep_set_access_flags(__vma, __addr, __ptep, __entry, __safely_writable) \
 ({                                                                      \
         int __changed = !pte_same(*(__ptep), __entry);                  \
-        if (__changed)                                                  \
-                ptep_establish(__vma, __addr, __ptep, __entry);         \
+        if (__changed) {                                                \
+                set_pte_at((__vma)->vm_mm, (__addr), __ptep, __entry);  \
+                flush_tlb_page(__vma, __addr);                          \
+        }                                                               \
         __changed;                                                      \
 })
 #endif
diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index 26215a9761..1039bf6b65 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -707,16 +707,19 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
         pte_val(*ptep) = _PAGE_TYPE_EMPTY;
 }
 
-static inline pte_t
-ptep_clear_flush(struct vm_area_struct *vma,
-                 unsigned long address, pte_t *ptep)
+static inline void ptep_invalidate(unsigned long address, pte_t *ptep)
 {
-        pte_t pte = *ptep;
-        pte_t *shadow_pte = get_shadow_pte(ptep);
-
         __ptep_ipte(address, ptep);
-        if (shadow_pte)
-                __ptep_ipte(address, shadow_pte);
+        ptep = get_shadow_pte(ptep);
+        if (ptep)
+                __ptep_ipte(address, ptep);
+}
+
+static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
+                                     unsigned long address, pte_t *ptep)
+{
+        pte_t pte = *ptep;
+        ptep_invalidate(address, ptep);
         return pte;
 }
 
@@ -726,21 +729,14 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
         set_pte_at(mm, addr, ptep, pte_wrprotect(old_pte));
 }
 
-static inline void
-ptep_establish(struct vm_area_struct *vma, 
-               unsigned long address, pte_t *ptep,
-               pte_t entry)
-{
-        ptep_clear_flush(vma, address, ptep);
-        set_pte(ptep, entry);
-}
-
-#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-({                                                                        \
-        int __changed = !pte_same(*(__ptep), __entry);                    \
-        if (__changed)                                                    \
-                ptep_establish(__vma, __address, __ptep, __entry);        \
-        __changed;                                                        \
+#define ptep_set_access_flags(__vma, __addr, __ptep, __entry, __dirty)  \
+({                                                                      \
+        int __changed = !pte_same(*(__ptep), __entry);                  \
+        if (__changed) {                                                \
+                ptep_invalidate(__addr, __ptep);                        \
+                set_pte_at((__vma)->vm_mm, __addr, __ptep, __entry);    \
+        }                                                               \
+        __changed;                                                      \
 })
 
 /*
@@ -940,7 +936,6 @@ extern int remove_shared_memory(unsigned long start, unsigned long size);
 #define __HAVE_ARCH_MEMMAP_INIT
 extern void memmap_init(unsigned long, int, unsigned long, unsigned long);
 
-#define __HAVE_ARCH_PTEP_ESTABLISH
 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH