Instead of using ioremap_cache(), which is slightly inappropriate for
mapping firmware tables, and is not even allowed on ARM for mapping
regions that are covered by a struct page, use memremap(), which was
invented for this purpose, and will also reuse the existing kernel
direct mapping if the requested region is covered by it.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
drivers/firmware/efi/arm-runtime.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
index 98fe93a9813b..17ccf0a8787a 100644
--- a/drivers/firmware/efi/arm-runtime.c
+++ b/drivers/firmware/efi/arm-runtime.c
@@ -111,8 +111,7 @@ static int __init arm_enable_runtime_services(void)
mapsize = efi.memmap.map_end - efi.memmap.map;
- efi.memmap.map = (__force void *)ioremap_cache(efi.memmap.phys_map,
- mapsize);
+ efi.memmap.map = memremap(efi.memmap.phys_map, mapsize, MEMREMAP_WB);
if (!efi.memmap.map) {
pr_err("Failed to remap EFI memory map\n");
return -ENOMEM;
--
2.5.0
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