[PATCH] microblaze: Fix pfn_valid() for noMMU

From: steve
Date: Fri Nov 13 2009 - 17:15:56 EST


Configuring DEBUG_SLAB causes a noMMU kernel to die during initialization
with an invalid virtual address panic in kfree_debugcheck().
The panic is due to an improper definition of pfn_valid().

Signed-off-by: Steven J. Magnani <steve@xxxxxxxxxxxxxxx>
---
diff -uprN a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
--- a/arch/microblaze/include/asm/page.h 2009-09-09 17:13:59.000000000 -0500
+++ b/arch/microblaze/include/asm/page.h 2009-11-13 15:20:26.000000000 -0600
@@ -161,7 +161,8 @@ 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)

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