From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Wed, 4 Oct 2006 18:02:23 +0000 (+0200)
Subject: [S390] Remove open-coded mem_map usage.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0b2b6e1ddce4696cb7afcbb15a654fe95428a498;p=linux-beck.git

[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 c302508ae31e..d99891718709 100644
--- 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 63c78b9399c4..efb7de9c1c6b 100644
--- 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 796c400f2b79..363ea761d5ee 100644
--- 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 803bc7064418..28619de5ecae 100644
--- 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 ecdff13b2505..519f0a5ff181 100644
--- 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))