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-rw-r--r--arch/microblaze/include/asm/page.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
index 880c988c2237..9b66c0fa9a32 100644
--- a/arch/microblaze/include/asm/page.h
+++ b/arch/microblaze/include/asm/page.h
@@ -164,7 +164,8 @@ extern int page_is_ram(unsigned long pfn);
# endif /* CONFIG_MMU */
# ifndef CONFIG_MMU
-# define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) <= max_mapnr)
+# define pfn_valid(pfn) (((pfn) >= min_low_pfn) && \
+ ((pfn) <= (min_low_pfn + max_mapnr)))
# define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
# else /* CONFIG_MMU */
# define ARCH_PFN_OFFSET (memory_start >> PAGE_SHIFT)