Re: [RFC PATCH] powerpc/le: enable RTAS events support

[Greg Kurz <gkurz@linux.vnet.ibm.com>]

On Tue, 1 Apr 2014 12:26:32 +0200
Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> On Mon, Mar 31, 2014 at 5:02 PM, Nathan Fontenot
> <nfont@linux.vnet.ibm.com> wrote:
> >  struct rtas_error_log {
> > -       unsigned long version:8;                /* Architectural version */
> > -       unsigned long severity:3;               /* Severity level of error */
> > -       unsigned long disposition:2;            /* Degree of recovery */
> > -       unsigned long extended:1;               /* extended log present? */
> > -       unsigned long /* reserved */ :2;        /* Reserved for future use */
> > -       unsigned long initiator:4;              /* Initiator of event */
> > -       unsigned long target:4;                 /* Target of failed operation */
> > -       unsigned long type:8;                   /* General event or error*/
> > -       unsigned long extended_log_length:32;   /* length in bytes */
> > -       unsigned char buffer[1];                /* Start of extended log */
> > +       /* Byte 0 */
> > +       uint8_t         version;                /* Architectural version */
> > +
> > +       /* Byte 1 */
> > +       uint8_t         severity;
> > +       /* XXXXXXXX
> > +        * XXX          3: Severity level of error
> > +        *    XX        2: Degree of recovery
> > +        *      X       1: Extended log present?
> > +        *       XX     2: Reserved
> > +        */
> > +
> > +       /* Byte 2 */
> > +       uint8_t         :8;
> > +       /* XXXXXXXX
> > +        * XXXX         4: Initiator of event
> > +        *     XXXX     4: Target of failed operation
> > +        */
> > +       uint8_t         type;                   /* General event or error*/
> > +       uint32_t        extended_log_length;    /* length in bytes */
> 
> Now the bitfields are gone, things like the above can become __be32,
> so we get extra type checking from sparse ("make C=1").
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 

I am reworking a patch in this direction.

Thanks.

--
Greg

> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
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-- 
Gregory Kurz                                     kurzgreg@fr.ibm.com
                                                 gkurz@linux.vnet.ibm.com
Software Engineer @ IBM/Meiosys                  http://www.ibm.com
Tel +33 (0)562 165 496

"Anarchy is about taking complete responsibility for yourself."
        Alan Moore.