Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug

Catalin Marinas
2015-11-23T10:19:51Z

On Sat, Nov 21, 2015 at 07:57:02PM -0800, Dan Williams wrote:
> diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
> index 04fb73b973f1..e13c4bf84d9e 100644
> --- a/arch/arm64/Kconfig.debug
> +++ b/arch/arm64/Kconfig.debug
> @@ -14,20 +14,6 @@ config ARM64_PTDUMP
> kernel.
> If in doubt, say "N"
>
> -config STRICT_DEVMEM
> - bool "Filter access to /dev/mem"
> - depends on MMU
> - help
> - If this option is disabled, you allow userspace (root) access to all
> - of memory, including kernel and userspace memory. Accidental
> - access to this is obviously disastrous, but specific access can
> - be used by people debugging the kernel.
> -
> - If this option is switched on, the /dev/mem file only allows
> - userspace access to memory mapped peripherals.
> -
> - If in doubt, say Y.
> -
> config PID_IN_CONTEXTIDR
> bool "Write the current PID to the CONTEXTIDR register"
> help

For arm64:

Acked-by: Catalin Marinas <catalin.marinas@arm.com>