Messages in this thread Patch in this message | | | Date | Thu, 20 May 2010 12:12:14 -0700 | From | Chris Metcalf <> | Subject | [PATCH] generic: 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> --- include/linux/mm.h | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h index fb19bb9..33bedcf 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; @@ -591,7 +592,7 @@ 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)
| |