[PATCH] arm64: Use __pa_symbol for empty_zero_page

[Laura Abbott]

On 01/24/2017 12:43 PM, Geert Uytterhoeven wrote:
> If CONFIG_DEBUG_VIRTUAL=y and CONFIG_ARM64_SW_TTBR0_PAN=y:
>
>     virt_to_phys used for non-linear address: ffffff8008cc0000 (empty_zero_page+0x0/0x1000)
>     WARNING: CPU: 0 PID: 0 at arch/arm64/mm/physaddr.c:14 __virt_to_phys+0x28/0x60
>     ...
>     [<ffffff800809abb4>] __virt_to_phys+0x28/0x60
>     [<ffffff8008a02600>] setup_arch+0x46c/0x4d4
>
> Fixes: 2077be6783b5936c ("arm64: Use __pa_symbol for kernel symbols")
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
>  arch/arm64/kernel/setup.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index 669fc9ff728b227f..b5222094ab52db6f 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -298,7 +298,7 @@ void __init setup_arch(char **cmdline_p)
>  	 * faults in case uaccess_enable() is inadvertently called by the init
>  	 * thread.
>  	 */
> -	init_task.thread_info.ttbr0 = virt_to_phys(empty_zero_page);
> +	init_task.thread_info.ttbr0 = __pa_symbol(empty_zero_page);
>  #endif
>
>  #ifdef CONFIG_VT
>

(thought I sent this yesterday but SMTP was not set correctly)

Acked-by: Laura Abbott <labbott at redhat.com>