From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: + mm-make-lowmem_page_address-use-pfn_phys-for-improved-portability.patch added to -mm tree Date: Fri, 21 May 2010 14:30:38 -0700 Message-ID: <201005212130.o4LLUcAp002572@imap1.linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:60828 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752986Ab0EUVaq (ORCPT ); Fri, 21 May 2010 17:30:46 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: mm-commits@vger.kernel.org Cc: cmetcalf@tilera.com, 21cnbao@gmail.com The patch titled mm: make lowmem_page_address() use PFN_PHYS() for improved portability has been added to the -mm tree. Its filename is mm-make-lowmem_page_address-use-pfn_phys-for-improved-portability.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: mm: make lowmem_page_address() use PFN_PHYS() for improved portability From: Chris Metcalf 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 Cc: Barry Song <21cnbao@gmail.com> Signed-off-by: Andrew Morton --- include/linux/mm.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff -puN include/linux/mm.h~mm-make-lowmem_page_address-use-pfn_phys-for-improved-portability include/linux/mm.h --- a/include/linux/mm.h~mm-make-lowmem_page_address-use-pfn_phys-for-improved-portability +++ a/include/linux/mm.h @@ -13,6 +13,7 @@ #include #include #include +#include struct mempolicy; struct anon_vma; @@ -595,7 +596,7 @@ static inline void set_page_links(struct 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) _ Patches currently in -mm which might be from cmetcalf@tilera.com are mm-make-lowmem_page_address-use-pfn_phys-for-improved-portability.patch