tree 9ac2dea288a0227d07cfd76cb7c770dfcdb565d2
parent e78eef554a912ef6c1e0bbf97619dafbeae3339f
author Marc Zyngier <marc.zyngier@arm.com> 1517939778 +0000
committer Catalin Marinas <catalin.marinas@arm.com> 1517957653 +0000

arm/arm64: smccc: Make function identifiers an unsigned quantity

Function identifiers are a 32bit, unsigned quantity. But we never
tell so to the compiler, resulting in the following:

 4ac:   b26187e0        mov     x0, #0xffffffff80000001

We thus rely on the firmware narrowing it for us, which is not
always a reasonable expectation.

Cc: stable@vger.kernel.org
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>