[S390] Remove open-coded mem_map usage.

Use page_to_phys and pfn_to_page to avoid open-coded mem_map usage.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index c302508..d998917 100644 (file)
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -62,19 +62,21 @@ void show_mem(void)
 {
         int i, total = 0, reserved = 0;
         int shared = 0, cached = 0;
+       struct page *page;
 
         printk("Mem-info:\n");
         show_free_areas();
         printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
         i = max_mapnr;
         while (i-- > 0) {
+               page = pfn_to_page(i);
                 total++;
-                if (PageReserved(mem_map+i))
+               if (PageReserved(page))
                         reserved++;
-                else if (PageSwapCache(mem_map+i))
+               else if (PageSwapCache(page))
                         cached++;
-                else if (page_count(mem_map+i))
-                        shared += page_count(mem_map+i) - 1;
+               else if (page_count(page))
+                       shared += page_count(page) - 1;
         }
         printk("%d pages of RAM\n",total);
         printk("%d reserved pages\n",reserved);

diff --git a/include/asm-s390/io.h b/include/asm-s390/io.h
index 63c78b9..efb7de9 100644 (file)
--- a/include/asm-s390/io.h
+++ b/include/asm-s390/io.h
@@ -45,11 +45,6 @@ static inline void * phys_to_virt(unsigned long address)
         return __io_virt(address);
 }
 
-/*
- * Change "struct page" to physical address.
- */
-#define page_to_phys(page)     ((page - mem_map) << PAGE_SHIFT)
-
 extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 
 static inline void * ioremap (unsigned long offset, unsigned long size)

diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index 796c400..363ea76 100644 (file)
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -137,6 +137,7 @@ page_get_storage_key(unsigned long addr)
 #define __pa(x)                 (unsigned long)(x)
 #define __va(x)                 (void *)(unsigned long)(x)
 #define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 
 #define pfn_valid(pfn)         ((pfn) < max_mapnr)
 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h
index 803bc70..28619de 100644 (file)
--- a/include/asm-s390/pgalloc.h
+++ b/include/asm-s390/pgalloc.h
@@ -116,7 +116,7 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 static inline void
 pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
 {
-       pmd_populate_kernel(mm, pmd, (pte_t *)((page-mem_map) << PAGE_SHIFT));
+       pmd_populate_kernel(mm, pmd, (pte_t *)page_to_phys(page));
 }
 
 /*

diff --git a/include/asm-s390/pgtable.h b/include/asm-s390/pgtable.h
index ecdff13..519f0a5 100644 (file)
--- a/include/asm-s390/pgtable.h
+++ b/include/asm-s390/pgtable.h
@@ -599,7 +599,7 @@ ptep_establish(struct vm_area_struct *vma,
  */
 static inline int page_test_and_clear_dirty(struct page *page)
 {
-       unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+       unsigned long physpage = page_to_phys(page);
        int skey = page_get_storage_key(physpage);
 
        if (skey & _PAGE_CHANGED)
@@ -612,13 +612,13 @@ static inline int page_test_and_clear_dirty(struct page *page)
  */
 static inline int page_test_and_clear_young(struct page *page)
 {
-       unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+       unsigned long physpage = page_to_phys(page);
        int ccode;
 
-       asm volatile (
-               "rrbe 0,%1\n"
-               "ipm  %0\n"
-               "srl  %0,28\n"
+       asm volatile(
+               "       rrbe    0,%1\n"
+               "       ipm     %0\n"
+               "       srl     %0,28\n"
                : "=d" (ccode) : "a" (physpage) : "cc" );
        return ccode & 2;
 }
@@ -636,7 +636,7 @@ static inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
 
 static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
 {
-       unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
+       unsigned long physpage = page_to_phys(page);
 
        return mk_pte_phys(physpage, pgprot);
 }
@@ -664,11 +664,11 @@ static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t pgprot)
 
 #define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
 
-#define pmd_page(pmd) (mem_map+(pmd_val(pmd) >> PAGE_SHIFT))
+#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
 
 #define pgd_page_vaddr(pgd) (pgd_val(pgd) & PAGE_MASK)
 
-#define pgd_page(pgd) (mem_map+(pgd_val(pgd) >> PAGE_SHIFT))
+#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
 
 /* to find an entry in a page-table-directory */
 #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))