X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-s390%2Fpgtable.h;h=85f043c6d5cfffd393aa490fcfd96a050d54bc19;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=11b67469be0a90dd5ffbd0773a7546a9f63a2eee;hpb=9213980e6a70d8473e0ffd4b39ab5b6caaba9ff5;p=linux-2.6.git

diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index 11b67469b..85f043c6d 100644
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -13,6 +13,8 @@
 #ifndef _ASM_S390_PGTABLE_H
 #define _ASM_S390_PGTABLE_H
 
+#include <asm-generic/4level-fixup.h>
+
 /*
  * The Linux memory management assumes a three-level page table setup. For
  * s390 31 bit we "fold" the mid level into the top-level page table, so
@@ -416,6 +418,14 @@ extern inline int pte_young(pte_t pte)
 	return 0;
 }
 
+extern inline int pte_read(pte_t pte)
+{
+	/* All pages are readable since we don't use the fetch
+	 * protection bit in the storage key.
+	 */
+	return 1;
+}
+
 /*
  * pgd/pmd/pte modification functions
  */
@@ -597,17 +607,13 @@ ptep_establish(struct vm_area_struct *vma,
  * should therefore only be called if it is not mapped in any
  * address space.
  */
-#define page_test_and_clear_dirty(page)					  \
+#define page_test_and_clear_dirty(_page)				  \
 ({									  \
-	struct page *__page = (page);					  \
+	struct page *__page = (_page);					  \
 	unsigned long __physpage = __pa((__page-mem_map) << PAGE_SHIFT);  \
-	int __skey;							  \
-	asm volatile ("iske %0,%1" : "=d" (__skey) : "a" (__physpage));   \
-	if (__skey & _PAGE_CHANGED) {					  \
-		asm volatile ("sske %0,%1"				  \
-			      : : "d" (__skey & ~_PAGE_CHANGED),	  \
-			          "a" (__physpage));			  \
-	}								  \
+	int __skey = page_get_storage_key(__physpage);			  \
+	if (__skey & _PAGE_CHANGED)					  \
+		page_set_storage_key(__physpage, __skey & ~_PAGE_CHANGED);\
 	(__skey & _PAGE_CHANGED);					  \
 })
 
@@ -654,10 +660,11 @@ static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
 	__pte;                                                            \
 })
 
-#define arch_set_page_uptodate(__page)					  \
-	do {								  \
-		asm volatile ("sske %0,%1" : : "d" (0),			  \
-			      "a" (__pa((__page-mem_map) << PAGE_SHIFT)));\
+#define SetPageUptodate(_page) \
+	do {								      \
+		struct page *__page = (_page);				      \
+		if (!test_and_set_bit(PG_uptodate, &__page->flags))	      \
+			page_test_and_clear_dirty(_page);		      \
 	} while (0)
 
 #ifdef __s390x__
@@ -682,7 +689,7 @@ static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
 #define pgd_page_kernel(pgd) (pgd_val(pgd) & PAGE_MASK)
 
 /* to find an entry in a page-table-directory */
-#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
 #define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
 
 /* to find an entry in a kernel page-table-directory */