arm64/efi: handle potential failure to remap memory map
authorArd Biesheuvel <ard.biesheuvel@linaro.org>
Thu, 15 Jan 2015 12:01:06 +0000 (12:01 +0000)
committerCatalin Marinas <catalin.marinas@arm.com>
Fri, 16 Jan 2015 16:18:16 +0000 (16:18 +0000)
commit7fe5d2b1daf6fd82857a8d0ee47547d7852ebe7b
treed2448d75cf793ea55c849d23bf8beade944e3736
parentd67703a8a69eecc8367bb9f848640b9efd430337
arm64/efi: handle potential failure to remap memory map

When remapping the UEFI memory map using ioremap_cache(), we
have to deal with potential failure. Note that, even if the
common case is for ioremap_cache() to return the existing linear
mapping of the memory map, we cannot rely on that to be always the
case, e.g., in the presence of a mem= kernel parameter.

At the same time, remove a stale comment and move the memmap code
together.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
arch/arm64/kernel/efi.c