x86: move page_is_ram() function

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 27 insertions, 23 deletions

diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 7c9bb3076b8a..f7b941c3b2c3 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -211,28 +211,6 @@ static inline int page_kills_ppro(unsigned long pagenr)
         return 0;
 }
 
-int page_is_ram(unsigned long pagenr)
-{
-        int i;
-        unsigned long addr, end;
-
-        for (i = 0; i < e820.nr_map; i++) {
-
-                if (e820.map[i].type != E820_RAM)       /* not usable memory */
-                        continue;
-                /*
-                 *      !!!FIXME!!! Some BIOSen report areas as RAM that
-                 *      are not. Notably the 640->1Mb area. We need a sanity
-                 *      check here.
-                 */
-                addr = (e820.map[i].addr+PAGE_SIZE-1) >> PAGE_SHIFT;
-                end = (e820.map[i].addr+e820.map[i].size) >> PAGE_SHIFT;
-                if  ((pagenr >= addr) && (pagenr < end))
-                        return 1;
-        }
-        return 0;
-}
-
 #ifdef CONFIG_HIGHMEM
 pte_t *kmap_pte;
 pgprot_t kmap_prot;
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index f4a2082568c8..d3026e1906f9 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -31,6 +31,30 @@ EXPORT_SYMBOL(__phys_addr);
 
 #endif
 
+int page_is_ram(unsigned long pagenr)
+{
+        unsigned long addr, end;
+        int i;
+
+        for (i = 0; i < e820.nr_map; i++) {
+                /*
+                 * Not usable memory:
+                 */
+                if (e820.map[i].type != E820_RAM)
+                        continue;
+                /*
+                 *      !!!FIXME!!! Some BIOSen report areas as RAM that
+                 *      are not. Notably the 640->1Mb area. We need a sanity
+                 *      check here.
+                 */
+                addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
+                end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
+                if ((pagenr >= addr) && (pagenr < end))
+                        return 1;
+        }
+        return 0;
+}
+
 /*
  * Fix up the linear direct mapping of the kernel to avoid cache attribute
  * conflicts.
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index e2c79d8dcdcf..c8b30efeed85 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -47,6 +47,9 @@
 
 
 #ifndef __ASSEMBLY__
+
+extern int page_is_ram(unsigned long pagenr);
+
 struct page;
 
 static void inline clear_user_page(void *page, unsigned long vaddr,
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index 11c4b39cada1..a6fd10f230d2 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -73,7 +73,6 @@ extern int nx_enabled;
  */
 extern unsigned int __VMALLOC_RESERVE;
 extern int sysctl_legacy_va_layout;
-extern int page_is_ram(unsigned long pagenr);
 
 #define VMALLOC_RESERVE         ((unsigned long)__VMALLOC_RESERVE)
 #define MAXMEM                  (-__PAGE_OFFSET-__VMALLOC_RESERVE)