Re: [PATCH 1/8] staging: lustre: Enclose complex macros in parentheses

[Greg Kroah-Hartman]

On Thu, Jan 11, 2018 at 06:16:55PM +0100, Fabian Huegel wrote:
> Checkpatch wants complex macros to be enclosed in parentheses, so we
> put parentheses around these four macros.
> 
> Signed-off-by: Fabian Huegel <fabian_huegel@xxxxxx>
> Signed-off-by: Christoph Volkert <linux@xxxxxxxxxxxxxxxxxxxx>
> ---
>  drivers/staging/lustre/lustre/include/obd_class.h | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/staging/lustre/lustre/include/obd_class.h b/drivers/staging/lustre/lustre/include/obd_class.h
> index 67c535c..5c8cf30 100644
> --- a/drivers/staging/lustre/lustre/include/obd_class.h
> +++ b/drivers/staging/lustre/lustre/include/obd_class.h
> @@ -294,10 +294,10 @@ struct obdo;
>  
>  void obdo_to_ioobj(const struct obdo *oa, struct obd_ioobj *ioobj);
>  
> -#define OBT(dev)	(dev)->obd_type
> -#define OBP(dev, op)    (dev)->obd_type->typ_dt_ops->op
> -#define MDP(dev, op)    (dev)->obd_type->typ_md_ops->op
> -#define CTXTP(ctxt, op) (ctxt)->loc_logops->lop_##op
> +#define OBT(dev)	((dev)->obd_type)
> +#define OBP(dev, op)    ((dev)->obd_type->typ_dt_ops->op)
> +#define MDP(dev, op)    ((dev)->obd_type->typ_md_ops->op)
> +#define CTXTP(ctxt, op) ((ctxt)->loc_logops->lop_##op)

That really doesn't make any sense, as this can only be a variable in
here, not any "complex expression".  Sometimes checkpatch.pl isn't very
smart.

Also, these macros are horridly named, odds are they are not even
needed...

thanks,

greg k-h