From patchwork Wed Sep 12 16:04:06 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyril Chemparathy X-Patchwork-Id: 1445201 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (unknown [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 92AEADF28C for ; Wed, 12 Sep 2012 16:22:55 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TBpQe-0006HE-75; Wed, 12 Sep 2012 16:04:40 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TBpQZ-0006GR-UP for linux-arm-kernel@lists.infradead.org; Wed, 12 Sep 2012 16:04:37 +0000 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id q8CG4Anl028766; Wed, 12 Sep 2012 11:04:10 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8CG4AFx028425; Wed, 12 Sep 2012 11:04:10 -0500 Received: from dlelxv22.itg.ti.com (172.17.1.197) by dfle73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.1.323.3; Wed, 12 Sep 2012 11:04:10 -0500 Received: from ares-ubuntu.am.dhcp.ti.com (ares-ubuntu.am.dhcp.ti.com [158.218.103.17]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8CG4AO5022760; Wed, 12 Sep 2012 11:04:10 -0500 Received: from a0875269 by ares-ubuntu.am.dhcp.ti.com with local (Exim 4.76) (envelope-from ) id 1TBpQA-0001n5-3B; Wed, 12 Sep 2012 12:04:10 -0400 From: Cyril Chemparathy To: , , , Subject: [PATCH] /dev/mem: use phys_addr_t for physical addresses Date: Wed, 12 Sep 2012 12:04:06 -0400 Message-ID: <1347465846-6844-1-git-send-email-cyril@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -7.3 (-------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-7.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [192.94.94.40 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.4 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: fenghua.yu@intel.com, tony.luck@intel.com, linux@arm.linux.org.uk, arnd@arndb.de, nico@linaro.org, tony@atomide.com, gregkh@linuxfoundation.org, will.deacon@arm.com, rob.herring@calxeda.com, dhowells@redhat.com, lethal@linux-sh.org, Cyril Chemparathy X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This patch fixes the /dev/mem driver to use phys_addr_t for physical addresses. This is required on PAE systems, especially those that run entirely out of >4G physical memory space. --- arch/arm/include/asm/io.h | 2 +- arch/arm/mm/mmap.c | 2 +- arch/ia64/include/asm/io.h | 2 +- arch/ia64/kernel/efi.c | 2 +- arch/sh/include/asm/io.h | 2 +- arch/sh/mm/mmap.c | 2 +- drivers/char/mem.c | 10 +++++----- 7 files changed, 11 insertions(+), 11 deletions(-) diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index 35c1ed8..f52a93d 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -374,7 +374,7 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr); #ifdef CONFIG_MMU #define ARCH_HAS_VALID_PHYS_ADDR_RANGE -extern int valid_phys_addr_range(unsigned long addr, size_t size); +extern int valid_phys_addr_range(phys_addr_t addr, size_t size); extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); extern int devmem_is_allowed(unsigned long pfn); #endif diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c index ce8cb19..89f2b7f 100644 --- a/arch/arm/mm/mmap.c +++ b/arch/arm/mm/mmap.c @@ -279,7 +279,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm) * You really shouldn't be using read() or write() on /dev/mem. This * might go away in the future. */ -int valid_phys_addr_range(unsigned long addr, size_t size) +int valid_phys_addr_range(phys_addr_t addr, size_t size) { if (addr < PHYS_OFFSET) return 0; diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h index 2c26321..74a7cc3 100644 --- a/arch/ia64/include/asm/io.h +++ b/arch/ia64/include/asm/io.h @@ -90,7 +90,7 @@ phys_to_virt (unsigned long address) #define ARCH_HAS_VALID_PHYS_ADDR_RANGE extern u64 kern_mem_attribute (unsigned long phys_addr, unsigned long size); -extern int valid_phys_addr_range (unsigned long addr, size_t count); /* efi.c */ +extern int valid_phys_addr_range (phys_addr_t addr, size_t count); /* efi.c */ extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count); /* diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index d37bbd4..f034563 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -870,7 +870,7 @@ kern_mem_attribute (unsigned long phys_addr, unsigned long size) EXPORT_SYMBOL(kern_mem_attribute); int -valid_phys_addr_range (unsigned long phys_addr, unsigned long size) +valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size) { u64 attr; diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h index 0cf60a6..c4302a5 100644 --- a/arch/sh/include/asm/io.h +++ b/arch/sh/include/asm/io.h @@ -382,7 +382,7 @@ static inline int iounmap_fixed(void __iomem *addr) { return -EINVAL; } #define xlate_dev_kmem_ptr(p) p #define ARCH_HAS_VALID_PHYS_ADDR_RANGE -int valid_phys_addr_range(unsigned long addr, size_t size); +int valid_phys_addr_range(phys_addr_t addr, size_t size); int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); #endif /* __KERNEL__ */ diff --git a/arch/sh/mm/mmap.c b/arch/sh/mm/mmap.c index afeb710..80bf494 100644 --- a/arch/sh/mm/mmap.c +++ b/arch/sh/mm/mmap.c @@ -238,7 +238,7 @@ bottomup: * You really shouldn't be using read() or write() on /dev/mem. This * might go away in the future. */ -int valid_phys_addr_range(unsigned long addr, size_t count) +int valid_phys_addr_range(phys_addr_t addr, size_t count) { if (addr < __MEMORY_START) return 0; diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 0537903..c6fa3bc 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -48,7 +48,7 @@ static inline unsigned long size_inside_page(unsigned long start, } #ifndef ARCH_HAS_VALID_PHYS_ADDR_RANGE -static inline int valid_phys_addr_range(unsigned long addr, size_t count) +static inline int valid_phys_addr_range(phys_addr_t addr, size_t count) { return addr + count <= __pa(high_memory); } @@ -96,7 +96,7 @@ void __weak unxlate_dev_mem_ptr(unsigned long phys, void *addr) static ssize_t read_mem(struct file *file, char __user *buf, size_t count, loff_t *ppos) { - unsigned long p = *ppos; + phys_addr_t p = *ppos; ssize_t read, sz; char *ptr; @@ -153,7 +153,7 @@ static ssize_t read_mem(struct file *file, char __user *buf, static ssize_t write_mem(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { - unsigned long p = *ppos; + phys_addr_t p = *ppos; ssize_t written, sz; unsigned long copied; void *ptr; @@ -226,7 +226,7 @@ int __weak phys_mem_access_prot_allowed(struct file *file, * */ #ifdef pgprot_noncached -static int uncached_access(struct file *file, unsigned long addr) +static int uncached_access(struct file *file, phys_addr_t addr) { #if defined(CONFIG_IA64) /* @@ -258,7 +258,7 @@ static pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot) { #ifdef pgprot_noncached - unsigned long offset = pfn << PAGE_SHIFT; + phys_addr_t offset = pfn << PAGE_SHIFT; if (uncached_access(file, offset)) return pgprot_noncached(vma_prot);