diff options
| -rw-r--r-- | arch/x86/mm/init.c | 24 | ||||
| -rw-r--r-- | arch/x86/mm/init_32.c | 21 | ||||
| -rw-r--r-- | 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 ce6a722587d8..f89df52683c5 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -1,9 +1,33 @@ +#include <linux/ioport.h> #include <linux/swap.h> + #include <asm/cacheflush.h> #include <asm/page.h> +#include <asm/page_types.h> #include <asm/sections.h> #include <asm/system.h> +/* + * 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 0b087dcd2c18..917c4e60c767 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 724e537432e7..074435e79824 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; |