uml: use get_free_pages to allocate kernel stacks

[powerpc.git] / include / asm-x86_64 / pgtable.h

diff --git a/include/asm-x86_64/pgtable.h b/include/asm-x86_64/pgtable.h
index 4e86aca..4f169ac 100644 (file)
--- a/include/asm-x86_64/pgtable.h
+++ b/include/asm-x86_64/pgtable.h
@@ -134,11 +134,11 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long
 #define USER_PTRS_PER_PGD      ((TASK_SIZE-1)/PGDIR_SIZE+1)
 #define FIRST_USER_ADDRESS     0
 
-#define MAXMEM          0x3fffffffffff
-#define VMALLOC_START    0xffffc20000000000
-#define VMALLOC_END      0xffffe1ffffffffff
-#define MODULES_VADDR    0xffffffff88000000
-#define MODULES_END      0xfffffffffff00000
+#define MAXMEM          _AC(0x3fffffffffff, UL)
+#define VMALLOC_START    _AC(0xffffc20000000000, UL)
+#define VMALLOC_END      _AC(0xffffe1ffffffffff, UL)
+#define MODULES_VADDR    _AC(0xffffffff88000000, UL)
+#define MODULES_END      _AC(0xfffffffffff00000, UL)
 #define MODULES_LEN   (MODULES_END - MODULES_VADDR)
 
 #define _PAGE_BIT_PRESENT      0
@@ -266,21 +266,15 @@ static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
  * Undefined behaviour if not..
  */
 #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT)
-static inline int pte_user(pte_t pte)          { return pte_val(pte) & _PAGE_USER; }
-static inline int pte_read(pte_t pte)          { return pte_val(pte) & _PAGE_USER; }
-static inline int pte_exec(pte_t pte)          { return !(pte_val(pte) & _PAGE_NX); }
 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_write(pte_t pte)         { return pte_val(pte) & _PAGE_RW; }
 static inline int pte_file(pte_t pte)          { return pte_val(pte) & _PAGE_FILE; }
 static inline int pte_huge(pte_t pte)          { return pte_val(pte) & _PAGE_PSE; }
 
-static inline pte_t pte_rdprotect(pte_t pte)   { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
-static inline pte_t pte_exprotect(pte_t pte)   { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
 static inline pte_t pte_mkclean(pte_t pte)     { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; }
 static inline pte_t pte_mkold(pte_t pte)       { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; }
 static inline pte_t pte_wrprotect(pte_t pte)   { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; }
-static inline pte_t pte_mkread(pte_t pte)      { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
 static inline pte_t pte_mkexec(pte_t pte)      { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_NX)); return pte; }
 static inline pte_t pte_mkdirty(pte_t pte)     { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; }
 static inline pte_t pte_mkyoung(pte_t pte)     { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; }
@@ -395,12 +389,14 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
  * bit at the same time. */
 #define  __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-       do {                                                              \
-               if (__dirty) {                                            \
-                       set_pte(__ptep, __entry);                         \
-                       flush_tlb_page(__vma, __address);                 \
-               }                                                         \
-       } while (0)
+({                                                                       \
+       int __changed = !pte_same(*(__ptep), __entry);                    \
+       if (__changed && __dirty) {                                       \
+               set_pte(__ptep, __entry);                                 \
+               flush_tlb_page(__vma, __address);                         \
+       }                                                                 \
+       __changed;                                                        \
+})
 
 /* Encode and de-code a swap entry */
 #define __swp_type(x)                  (((x).val >> 1) & 0x3f)