Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6

[pandora-kernel.git] / include / asm-powerpc / pgtable-ppc32.h

diff --git a/include/asm-powerpc/pgtable-ppc32.h b/include/asm-powerpc/pgtable-ppc32.h
index 5b14536..86a54a4 100644 (file)
--- a/include/asm-powerpc/pgtable-ppc32.h
+++ b/include/asm-powerpc/pgtable-ppc32.h
@@ -500,9 +500,7 @@ extern unsigned long bad_call_to_PMD_PAGE_SIZE(void);
  * The following only work if pte_present() is true.
  * Undefined behaviour if not..
  */
-static inline int pte_read(pte_t pte)          { return pte_val(pte) & _PAGE_USER; }
 static inline int pte_write(pte_t pte)         { return pte_val(pte) & _PAGE_RW; }
-static inline int pte_exec(pte_t pte)          { return pte_val(pte) & _PAGE_EXEC; }
 static inline int pte_dirty(pte_t pte)         { return pte_val(pte) & _PAGE_DIRTY; }
 static inline int pte_young(pte_t pte)         { return pte_val(pte) & _PAGE_ACCESSED; }
 static inline int pte_file(pte_t pte)          { return pte_val(pte) & _PAGE_FILE; }
@@ -510,21 +508,13 @@ static inline int pte_file(pte_t pte)             { return pte_val(pte) & _PAGE_FILE; }
 static inline void pte_uncache(pte_t pte)       { pte_val(pte) |= _PAGE_NO_CACHE; }
 static inline void pte_cache(pte_t pte)         { pte_val(pte) &= ~_PAGE_NO_CACHE; }
 
-static inline pte_t pte_rdprotect(pte_t pte) {
-       pte_val(pte) &= ~_PAGE_USER; return pte; }
 static inline pte_t pte_wrprotect(pte_t pte) {
        pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; }
-static inline pte_t pte_exprotect(pte_t pte) {
-       pte_val(pte) &= ~_PAGE_EXEC; return pte; }
 static inline pte_t pte_mkclean(pte_t pte) {
        pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; }
 static inline pte_t pte_mkold(pte_t pte) {
        pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
 
-static inline pte_t pte_mkread(pte_t pte) {
-       pte_val(pte) |= _PAGE_USER; return pte; }
-static inline pte_t pte_mkexec(pte_t pte) {
-       pte_val(pte) |= _PAGE_USER | _PAGE_EXEC; return pte; }
 static inline pte_t pte_mkwrite(pte_t pte) {
        pte_val(pte) |= _PAGE_RW; return pte; }
 static inline pte_t pte_mkdirty(pte_t pte) {
@@ -631,13 +621,6 @@ static inline int __ptep_test_and_clear_young(unsigned int context, unsigned lon
 #define ptep_test_and_clear_young(__vma, __addr, __ptep) \
        __ptep_test_and_clear_young((__vma)->vm_mm->context.id, __addr, __ptep)
 
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma,
-                                           unsigned long addr, pte_t *ptep)
-{
-       return (pte_update(ptep, (_PAGE_DIRTY | _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0;
-}
-
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
                                       pte_t *ptep)
@@ -661,10 +644,14 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry, int dirty)
 }
 
 #define  ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-       do {                                                               \
-               __ptep_set_access_flags(__ptep, __entry, __dirty);         \
-               flush_tlb_page_nohash(__vma, __address);                   \
-       } while(0)
+({                                                                        \
+       int __changed = !pte_same(*(__ptep), __entry);                     \
+       if (__changed) {                                                   \
+               __ptep_set_access_flags(__ptep, __entry, __dirty);         \
+               flush_tlb_page_nohash(__vma, __address);                   \
+       }                                                                  \
+       __changed;                                                         \
+})
 
 /*
  * Macro to mark a page protection value as "uncacheable".