[MIPS] Consolidate definitions of pfn_valid in one file.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index 4035ec7..3d262c0 100644
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -145,6 +145,25 @@
#endif
#endif
+#ifdef CONFIG_FLATMEM
+
+#define pfn_valid(pfn) ((pfn) < max_mapnr)
+
+#elif defined(CONFIG_NEED_MULTIPLE_NODES)
+
+#define pfn_valid(pfn) \
+({ \
+ unsigned long __pfn = (pfn); \
+ int __n = pfn_to_nid(__pfn); \
+ ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
+ NODE_DATA(__n)->node_spanned_pages) \
+ : 0); \
+})
+
+#else
+#error Provide a definition of pfn_valid
+#endif
+
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)