Rework ptep_set_access_flags and fix sun4c

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-ppc / pgtable.h

diff --git a/include/asm-ppc/pgtable.h b/include/asm-ppc/pgtable.h
index 51fa7c662917a71a0554af6d631495f104113dd2..9d0ce9ff584026df772125dff65d5e03c85395b4 100644 (file)
--- a/include/asm-ppc/pgtable.h
+++ b/include/asm-ppc/pgtable.h
@@ -526,7 +526,7 @@ static inline int pgd_bad(pgd_t pgd)                { return 0; }
 static inline int pgd_present(pgd_t pgd)       { return 1; }
 #define pgd_clear(xp)                          do { } while (0)
 
-#define pgd_page(pgd) \
+#define pgd_page_vaddr(pgd) \
        ((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
 
 /*
@@ -694,10 +694,14 @@ 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".
@@ -720,12 +724,12 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
  * of the pte page.  -- paulus
  */
 #ifndef CONFIG_BOOKE
-#define pmd_page_kernel(pmd)   \
+#define pmd_page_vaddr(pmd)    \
        ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
 #define pmd_page(pmd)          \
        (mem_map + (pmd_val(pmd) >> PAGE_SHIFT))
 #else
-#define pmd_page_kernel(pmd)   \
+#define pmd_page_vaddr(pmd)    \
        ((unsigned long) (pmd_val(pmd) & PAGE_MASK))
 #define pmd_page(pmd)          \
        (mem_map + (__pa(pmd_val(pmd)) >> PAGE_SHIFT))
@@ -748,7 +752,7 @@ static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
 #define pte_index(address)             \
        (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
 #define pte_offset_kernel(dir, addr)   \
-       ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(addr))
+       ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir, addr)              \
        ((pte_t *) kmap_atomic(pmd_page(*(dir)), KM_PTE0) + pte_index(addr))
 #define pte_offset_map_nested(dir, addr)       \
@@ -827,10 +831,6 @@ static inline int io_remap_pfn_range(struct vm_area_struct *vma,
                remap_pfn_range(vma, vaddr, pfn, size, prot)
 #endif
 
-#define MK_IOSPACE_PFN(space, pfn)     (pfn)
-#define GET_IOSPACE(pfn)               0
-#define GET_PFN(pfn)                   (pfn)
-
 /*
  * No page table caches to initialise
  */