The patch titled
microblaze: fix pfn_valid() for noMMU
has been added to the -mm tree. Its filename is
microblaze-fix-pfn_valid-for-nommu.patch
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------------------------------------------------------
Subject: microblaze: fix pfn_valid() for noMMU
From: Steven J. Magnani <steve@xxxxxxxxxxxxxxx>
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>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/microblaze/include/asm/page.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN arch/microblaze/include/asm/page.h~microblaze-fix-pfn_valid-for-nommu arch/microblaze/include/asm/page.h
--- a/arch/microblaze/include/asm/page.h~microblaze-fix-pfn_valid-for-nommu
+++ a/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)
_
Patches currently in -mm which might be from steve@xxxxxxxxxxxxxxx are
microblaze-fix-pfn_valid-for-nommu.patch
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