+ mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch added to -mm tree

+ mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm-page_alloc-always-initialize-memory-map-for-the-holes-fix
has been added to the -mm tree.  Its filename is
     mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch

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------------------------------------------------------
From: Mike Rapoport <rppt@kernel.org>
Subject: mm-page_alloc-always-initialize-memory-map-for-the-holes-fix

It appears that petalogix-ml605 memory starts at 0x50000, but microblaze's
pfn_valid does not reject pfns < ARCH_PFN_OFFSET.

Link: https://lkml.kernel.org/r/YQWW3RCE4eWBuMu/@kernel.org
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/microblaze/include/asm/page.h |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/microblaze/include/asm/page.h~mm-page_alloc-always-initialize-memory-map-for-the-holes-fix
+++ a/arch/microblaze/include/asm/page.h
@@ -112,8 +112,7 @@ extern int page_is_ram(unsigned long pfn
 #  define page_to_phys(page)     (page_to_pfn(page) << PAGE_SHIFT)
 
 #  define ARCH_PFN_OFFSET	(memory_start >> PAGE_SHIFT)
-#  define pfn_valid(pfn)	((pfn) < (max_mapnr + ARCH_PFN_OFFSET))
-
+#  define pfn_valid(pfn)	((pfn) >= ARCH_PFN_OFFSET && (pfn) < (max_mapnr + ARCH_PFN_OFFSET))
 # endif /* __ASSEMBLY__ */
 
 #define	virt_addr_valid(vaddr)	(pfn_valid(virt_to_pfn(vaddr)))
_

Patches currently in -mm which might be from rppt@kernel.org are

mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch