From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756111AbZCDLH1 (ORCPT ); Wed, 4 Mar 2009 06:07:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752848AbZCDLHM (ORCPT ); Wed, 4 Mar 2009 06:07:12 -0500 Received: from hera.kernel.org ([140.211.167.34]:42213 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752796AbZCDLHJ (ORCPT ); Wed, 4 Mar 2009 06:07:09 -0500 Date: Wed, 4 Mar 2009 11:06:35 GMT From: Pekka Enberg To: linux-tip-commits@vger.kernel.org Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, penberg@cs.helsinki.fi, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, penberg@cs.helsinki.fi, tglx@linutronix.de, mingo@elte.hu In-Reply-To: <1236160001.29024.29.camel@penberg-laptop> References: <1236160001.29024.29.camel@penberg-laptop> Subject: [tip:x86/mm] x86: move devmem_is_allowed() to common mm/init.c Message-ID: Git-Commit-ID: 540aca06b737cc38965b52eeceefba3d24376461 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Wed, 04 Mar 2009 11:06:37 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 540aca06b737cc38965b52eeceefba3d24376461 Gitweb: http://git.kernel.org/tip/540aca06b737cc38965b52eeceefba3d24376461 Author: "Pekka Enberg" AuthorDate: Wed, 4 Mar 2009 11:46:40 +0200 Commit: Ingo Molnar CommitDate: Wed, 4 Mar 2009 11:40:04 +0100 x86: move devmem_is_allowed() to common mm/init.c Impact: cleanup The function is identical on 32-bit and 64-bit configurations so move it to the common mm/init.c file. Signed-off-by: Pekka Enberg LKML-Reference: <1236160001.29024.29.camel@penberg-laptop> Signed-off-by: Ingo Molnar --- arch/x86/mm/init.c | 24 ++++++++++++++++++++++++ arch/x86/mm/init_32.c | 21 --------------------- arch/x86/mm/init_64.c | 22 ---------------------- 3 files changed, 24 insertions(+), 43 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index ce6a722..f89df52 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1,9 +1,33 @@ +#include #include + #include #include +#include #include #include +/* + * devmem_is_allowed() checks to see if /dev/mem access to a certain address + * is valid. The argument is a physical page number. + * + * + * On x86, access has to be given to the first megabyte of ram because that area + * contains bios code and data regions used by X and dosemu and similar apps. + * Access has to be given to non-kernel-ram areas as well, these contain the PCI + * mmio resources as well as potential bios/acpi data regions. + */ +int devmem_is_allowed(unsigned long pagenr) +{ + if (pagenr <= 256) + return 1; + if (iomem_is_exclusive(pagenr << PAGE_SHIFT)) + return 0; + if (!page_is_ram(pagenr)) + return 1; + return 0; +} + void free_init_pages(char *what, unsigned long begin, unsigned long end) { unsigned long addr = begin; diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 0b087dc..917c4e6 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -354,27 +354,6 @@ repeat: } } -/* - * devmem_is_allowed() checks to see if /dev/mem access to a certain address - * is valid. The argument is a physical page number. - * - * - * On x86, access has to be given to the first megabyte of ram because that area - * contains bios code and data regions used by X and dosemu and similar apps. - * Access has to be given to non-kernel-ram areas as well, these contain the PCI - * mmio resources as well as potential bios/acpi data regions. - */ -int devmem_is_allowed(unsigned long pagenr) -{ - if (pagenr <= 256) - return 1; - if (iomem_is_exclusive(pagenr << PAGE_SHIFT)) - return 0; - if (!page_is_ram(pagenr)) - return 1; - return 0; -} - pte_t *kmap_pte; pgprot_t kmap_prot; diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 724e537..074435e 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -876,28 +876,6 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); #endif /* CONFIG_MEMORY_HOTPLUG */ -/* - * devmem_is_allowed() checks to see if /dev/mem access to a certain address - * is valid. The argument is a physical page number. - * - * - * On x86, access has to be given to the first megabyte of ram because that area - * contains bios code and data regions used by X and dosemu and similar apps. - * Access has to be given to non-kernel-ram areas as well, these contain the PCI - * mmio resources as well as potential bios/acpi data regions. - */ -int devmem_is_allowed(unsigned long pagenr) -{ - if (pagenr <= 256) - return 1; - if (iomem_is_exclusive(pagenr << PAGE_SHIFT)) - return 0; - if (!page_is_ram(pagenr)) - return 1; - return 0; -} - - static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules, kcore_vsyscall;