pkeys: Reserve PKEY_DISABLE_READ

[Ram Pai]

On Wed, Dec 05, 2018 at 02:00:59PM +0100, Florian Weimer wrote:
> * Ram Pai:
> 
> > Ok. here is a patch, compiled but not tested. See if this meets the
> > specifications.
> >
> > -----------------------------------------------------------------------------------
> >
> > commit 3dc06e73f3795921265d5d1d935e428deab01616
> > Author: Ram Pai <linuxram at us.ibm.com>
> > Date:   Tue Dec 4 00:04:11 2018 -0500
> >
> >     pkeys: add support of PKEY_DISABLE_READ
> 
> Thanks.  In the x86 code, the translation of PKEY_DISABLE_READ |
> PKEY_DISABLE_WRITE to PKEY_DISABLE_ACCESS appears to be missing.  I
> believe the existing code produces PKEY_DISABLE_WRITE, which is wrong.

ah. yes. good point.

> 
> Rest looks okay to me (again not tested).

thanks,
RP