Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756046Ab1EKVGn (ORCPT ); Wed, 11 May 2011 17:06:43 -0400 Received: from c-76-97-164-112.hsd1.ga.comcast.net ([76.97.164.112]:55110 "EHLO deneb.localdomain" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755664Ab1EKVGl (ORCPT ); Wed, 11 May 2011 17:06:41 -0400 X-Greylist: delayed 3155 seconds by postgrey-1.27 at vger.kernel.org; Wed, 11 May 2011 17:06:39 EDT From: Mark Salter To: linux-kernel@vger.kernel.org Subject: [PATCH 02/16] fixed generic page.h for non-zero PAGE_OFFSET Date: Wed, 11 May 2011 16:13:49 -0400 Message-Id: <1305144843-5058-3-git-send-email-msalter@redhat.com> X-Mailer: git-send-email 1.6.2.5 In-Reply-To: <1305144843-5058-2-git-send-email-msalter@redhat.com> References: <1305144843-5058-1-git-send-email-msalter@redhat.com> <1305144843-5058-2-git-send-email-msalter@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1696 Lines: 47 asm-generic/page.h had several problems when used with a non-zero PAGE_OFFSET. This patch adds a default ARCH_PFN_OFFSET and fixes the __va, __pa, and pfn_valid macros to work with non-zero PAGE_OFFSETs. Signed-off-by: Mark Salter --- include/asm-generic/page.h | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h index 75fec18..f376db2 100644 --- a/include/asm-generic/page.h +++ b/include/asm-generic/page.h @@ -71,10 +71,14 @@ extern unsigned long memory_end; #define PAGE_OFFSET (0) #endif +#ifndef ARCH_PFN_OFFSET +#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) +#endif + #ifndef __ASSEMBLY__ -#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) -#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) +#define __va(x) ((void *)((unsigned long) (x))) +#define __pa(x) ((unsigned long) (x)) #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) @@ -86,7 +90,7 @@ extern unsigned long memory_end; #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) #endif -#define pfn_valid(pfn) ((pfn) < max_mapnr) +#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && ((pfn) - ARCH_PFN_OFFSET) < max_mapnr) #define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ ((void *)(kaddr) < (void *)memory_end)) -- 1.6.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/