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authorChris Metcalf <cmetcalf@tilera.com>2010-05-24 14:32:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 08:07:02 -0700
commitc6f6b596a5a73e63e5e930c414375c0c389199ab (patch)
tree900d4b3a6d198edc2045511b5b8d6001755bcfbf /include/linux/mm.h
parent4eaf3f64397c3db3c5785eee508270d62a9fabd9 (diff)
mm: make lowmem_page_address() use PFN_PHYS() for improved portability
This ensures that platforms with lowmem PAs above 32 bits work correctly by avoiding truncating the PA during a left shift. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Cc: Barry Song <21cnbao@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 963f908af9d0..b969efb03787 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -13,6 +13,7 @@
#include <linux/debug_locks.h>
#include <linux/mm_types.h>
#include <linux/range.h>
+#include <linux/pfn.h>
struct mempolicy;
struct anon_vma;
@@ -595,7 +596,7 @@ static inline void set_page_links(struct page *page, enum zone_type zone,
static __always_inline void *lowmem_page_address(struct page *page)
{
- return __va(page_to_pfn(page) << PAGE_SHIFT);
+ return __va(PFN_PHYS(page_to_pfn(page)));
}
#if defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL)