powerpc: Fix pfn_valid() when memory starts at a non-zero address
authorScott Wood <scottwood@freescale.com>
Thu, 27 Jan 2011 10:31:38 +0000 (10:31 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Mon, 7 Feb 2011 01:47:56 +0000 (12:47 +1100)
max_mapnr is a pfn, not an index innto mem_map[].  So don't add
ARCH_PFN_OFFSET a second time.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/include/asm/page.h

index 53b64be40eb29f2cc4f2aee6eba2ae5f93d4b470..da4b200085411989593edd7fe3dd02c86446d09e 100644 (file)
@@ -101,7 +101,7 @@ extern phys_addr_t kernstart_addr;
 
 #ifdef CONFIG_FLATMEM
 #define ARCH_PFN_OFFSET                (MEMORY_START >> PAGE_SHIFT)
-#define pfn_valid(pfn)         ((pfn) >= ARCH_PFN_OFFSET && (pfn) < (ARCH_PFN_OFFSET + max_mapnr))
+#define pfn_valid(pfn)         ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr)
 #endif
 
 #define virt_to_page(kaddr)    pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)