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Diffstat (limited to 'include/asm-x86_64/page.h')
-rw-r--r--include/asm-x86_64/page.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h
index 135ffaa0393..e5ab4d231f2 100644
--- a/include/asm-x86_64/page.h
+++ b/include/asm-x86_64/page.h
@@ -32,6 +32,8 @@
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
+extern unsigned long end_pfn;
+
void clear_page(void *);
void copy_page(void *, void *);
@@ -111,7 +113,7 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#ifdef CONFIG_FLATMEM
#define pfn_to_page(pfn) (mem_map + (pfn))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
-#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#define pfn_valid(pfn) ((pfn) < end_pfn)
#endif
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)