[PATCH v3] powerpc, pkey: make protection key 0 less special

[Dave Hansen]

On 05/04/2018 12:22 PM, Ram Pai wrote:
> @@ -407,9 +414,6 @@ static bool pkey_access_permitted(int pkey, bool write, bool execute)
>  	int pkey_shift;
>  	u64 amr;
>  
> -	if (!pkey)
> -		return true;
> -
>  	if (!is_pkey_enabled(pkey))
>  		return true;

Looks fine to me.  Obviously doesn't have any impact on x86 or the
generic code.

One question, though.  Which other check makes up for this removed !pkey
check?