diff options
| -rw-r--r-- | arch/x86/include/asm/pat.h | 2 | ||||
| -rw-r--r-- | arch/x86/mm/iomap_32.c | 12 | ||||
| -rw-r--r-- | arch/x86/mm/pat.c | 18 |
3 files changed, 18 insertions, 14 deletions
diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index e2c1668dde7a..a8438bc06871 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -20,7 +20,7 @@ extern int kernel_map_sync_memtype(u64 base, unsigned long size, unsigned long flag); int io_reserve_memtype(resource_size_t start, resource_size_t end, - unsigned long *type); + enum page_cache_mode *pcm); void io_free_memtype(resource_size_t start, resource_size_t end); diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 7b179b499fa3..9ca35fc60cfe 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -33,17 +33,17 @@ static int is_io_mapping_possible(resource_size_t base, unsigned long size) int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot) { - unsigned long flag = _PAGE_CACHE_WC; + enum page_cache_mode pcm = _PAGE_CACHE_MODE_WC; int ret; if (!is_io_mapping_possible(base, size)) return -EINVAL; - ret = io_reserve_memtype(base, base + size, &flag); + ret = io_reserve_memtype(base, base + size, &pcm); if (ret) return ret; - *prot = __pgprot(__PAGE_KERNEL | flag); + *prot = __pgprot(__PAGE_KERNEL | cachemode2protval(pcm)); return 0; } EXPORT_SYMBOL_GPL(iomap_create_wc); @@ -82,8 +82,10 @@ iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) * MTRR is UC or WC. UC_MINUS gets the real intention, of the * user, which is "WC if the MTRR is WC, UC if you can't do that." */ - if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC)) - prot = PAGE_KERNEL_UC_MINUS; + if (!pat_enabled && pgprot_val(prot) == + (__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_WC))) + prot = __pgprot(__PAGE_KERNEL | + cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS)); return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, prot); } diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 47282c273647..6d5a8e3ef63d 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -442,25 +442,27 @@ static unsigned long lookup_memtype(u64 paddr) * On failure, returns non-zero */ int io_reserve_memtype(resource_size_t start, resource_size_t end, - unsigned long *type) + enum page_cache_mode *type) { resource_size_t size = end - start; - unsigned long req_type = *type; - unsigned long new_type; + enum page_cache_mode req_type = *type; + enum page_cache_mode new_type; + unsigned long new_prot; int ret; WARN_ON_ONCE(iomem_map_sanity_check(start, size)); - ret = reserve_memtype(start, end, req_type, &new_type); + ret = reserve_memtype(start, end, cachemode2protval(req_type), + &new_prot); if (ret) goto out_err; - if (!is_new_memtype_allowed(start, size, - pgprot2cachemode(__pgprot(req_type)), - pgprot2cachemode(__pgprot(new_type)))) + new_type = pgprot2cachemode(__pgprot(new_prot)); + + if (!is_new_memtype_allowed(start, size, req_type, new_type)) goto out_free; - if (kernel_map_sync_memtype(start, size, new_type) < 0) + if (kernel_map_sync_memtype(start, size, new_prot) < 0) goto out_free; *type = new_type; |