Re: [PATCH V3 1/2] ACPI / EC: Fix broken big-endian 64bit platforms using 'global_lock'

Sudeep Holla
2015-09-23T09:15:47Z

On 15/09/15 09:34, Viresh Kumar wrote:
> global_lock is defined as an unsigned long and accessing only its lower
> 32 bits from sysfs is incorrect, as we need to consider other 32 bits
> for big endian 64 bit systems.
>
> Fix that by making global_lock an u32 instead.
>
> Cc: <stable@vger.kernel.org> # v4.1+
> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
>
> ---
> Its marked just for # v4.1+, because arm64 has the first 64 big-endian
> platform with ACPI. And ACPI support for that is mainlined recently
> only (Arnd Bergmann).
>

Just to clarify, we don't support big-endian with ACPI on ARM64.
We mandate use of EFI for ACPI on ARM64 and EFI spec mandates only
little endian.

Regards,
Sudeep