[PATCH v2 6/6] powerpc/pkeys: Deny read/write/execute by default

[Florian Weimer]

On 06/19/2018 02:39 PM, Michael Ellerman wrote:
> Ram Pai <linuxram at us.ibm.com> writes:
>> Deny all permissions on all keys, with some exceptions.  pkey-0 must
>> allow all permissions, or else everything comes to a screaching halt.
>> Execute-only key must allow execute permission.
> 
> Another ABI change.
> 
> Are we calling this a bug fix?

Yes.  Note that the default is configurable on x86 (default is deny), so 
it's not really an ABI change as such IMHO.

Thanks,
Florian