| From | Matt Fleming <> | Subject | [PATCH 09/40] efi/arm*: Use memremap() to create the persistent memmap mapping | Date | Mon, 25 Apr 2016 21:06:41 +0100 |
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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> --- 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 55a9ea041068..19283deac375 100644 --- a/drivers/firmware/efi/arm-runtime.c +++ b/drivers/firmware/efi/arm-runtime.c @@ -105,8 +105,7 @@ 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; -- 2.7.3
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