[PATCH] arm64: kernel: do not mark reserved memory regions as IORESOURCE_BUSY

[will.deacon@arm.com (Will Deacon)]

On Tue, Jan 24, 2017 at 05:11:40PM +0000, Ard Biesheuvel wrote:
> Memory regions marked as NOMAP should not be used for general allocation
> by the kernel, and should not even be covered by the linear mapping
> (hence the name). However, drivers or other subsystems (such as ACPI)
> that access the firmware directly may legally access them, which means
> it is also reasonable for such drivers to claim them by invoking
> request_resource(). Currently, this is prevented by the fact that arm64's
> request_standard_resources() marks reserved regions as IORESOURCE_BUSY.
> 
> So drop the IORESOURCE_BUSY flag from these requests.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  arch/arm64/kernel/setup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Did you find this my inspection, or has somebody reported a problem?

Will