diff options
Diffstat (limited to 'arch/x86/mm/iomap_32.c')
| -rw-r--r-- | arch/x86/mm/iomap_32.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 592984e5496b..e331f77348a7 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -18,8 +18,8 @@ #include <asm/iomap.h> #include <asm/pat.h> -#include <asm/highmem.h> #include <linux/module.h> +#include <linux/highmem.h> int is_io_mapping_possible(resource_size_t base, unsigned long size) { @@ -32,7 +32,24 @@ int is_io_mapping_possible(resource_size_t base, unsigned long size) } EXPORT_SYMBOL_GPL(is_io_mapping_possible); -/* Map 'pfn' using fixed map 'type' and protections 'prot' +void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) +{ + enum fixed_addresses idx; + unsigned long vaddr; + + pagefault_disable(); + + debug_kmap_atomic(type); + idx = type + KM_TYPE_NR * smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); + set_pte(kmap_pte - idx, pfn_pte(pfn, prot)); + arch_flush_lazy_mmu_mode(); + + return (void *)vaddr; +} + +/* + * Map 'pfn' using fixed map 'type' and protections 'prot' */ void * iomap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) |