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@xxxxxxxxxx>
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@xxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
mm-page_alloc-always-initialize-memory-map-for-the-holes-fix.patch
