[PATCH 6/8] powerpc/rtas: lockdep annotations

[Andrew Donnellan]

On Mon, 2023-03-06 at 15:33 -0600, Nathan Lynch via B4 Relay wrote:
> From: Nathan Lynch <nathanl at linux.ibm.com>
> 
> Add lockdep annotations for the following properties that must hold:
> 
> * Any error log retrieval must be atomically coupled with the prior
>   RTAS call, without a window for another RTAS call to occur before
> the
>   error log can be retrieved.
> 
> * All users of the core rtas_args parameter block must hold
> rtas_lock.
> 
> Move the definitions of rtas_lock and rtas_args up in the file so
> that
> __do_enter_rtas_trace() can refer to them.
> 
> Signed-off-by: Nathan Lynch <nathanl at linux.ibm.com>

I'm no lockdep expert and I haven't checked if every possible case that
can be annotated has been annotated, but these changes make sense as
far as I can tell from my limited inspection.

Reviewed-by: Andrew Donnellan <ajd at linux.ibm.com>

-- 
Andrew Donnellan    OzLabs, ADL Canberra
ajd at linux.ibm.com   IBM Australia Limited