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Diffstat (limited to 'arch/x86/mm/iomap_32.c')
-rw-r--r--arch/x86/mm/iomap_32.c55
1 files changed, 4 insertions, 51 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index d5e2842..04102d4 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -20,63 +20,16 @@
#include <asm/pat.h>
#include <linux/module.h>
-#ifdef CONFIG_X86_PAE
-static int
-is_io_mapping_possible(resource_size_t base, unsigned long size)
-{
- return 1;
-}
-#else
-static int
-is_io_mapping_possible(resource_size_t base, unsigned long size)
+int is_io_mapping_possible(resource_size_t base, unsigned long size)
{
+#ifndef CONFIG_X86_PAE
/* There is no way to map greater than 1 << 32 address without PAE */
if (base + size > 0x100000000ULL)
return 0;
-
- return 1;
-}
#endif
-
-int
-reserve_io_memtype_wc(u64 base, unsigned long size, pgprot_t *prot)
-{
- unsigned long ret_flag;
-
- if (!is_io_mapping_possible(base, size))
- goto out_err;
-
- if (!pat_enabled) {
- *prot = pgprot_noncached(PAGE_KERNEL);
- return 0;
- }
-
- if (reserve_memtype(base, base + size, _PAGE_CACHE_WC, &ret_flag))
- goto out_err;
-
- if (ret_flag == _PAGE_CACHE_WB)
- goto out_free;
-
- if (kernel_map_sync_memtype(base, size, ret_flag))
- goto out_free;
-
- *prot = __pgprot(__PAGE_KERNEL | ret_flag);
- return 0;
-
-out_free:
- free_memtype(base, base + size);
-out_err:
- return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(reserve_io_memtype_wc);
-
-void
-free_io_memtype(u64 base, unsigned long size)
-{
- if (pat_enabled)
- free_memtype(base, base + size);
+ return 1;
}
-EXPORT_SYMBOL_GPL(free_io_memtype);
+EXPORT_SYMBOL_GPL(is_io_mapping_possible);
/* Map 'pfn' using fixed map 'type' and protections 'prot'
*/
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