x86: move page_is_ram() function
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 7c9bb30..f7b941c 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -211,28 +211,6 @@
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 f4a2082..d3026e1 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -31,6 +31,30 @@
#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 e2c79d8..c8b30ef 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 11c4b39..a6fd10f 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -73,7 +73,6 @@
*/
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)
