[PATCH 1/3] drm: extra printk() wrapper macros

[Eric Engestrom]

On Mon, Jul 11, 2016 at 07:01:27PM +0100, Dave Gordon wrote:
> We had only DRM_INFO() and DRM_ERROR(), whereas the underlying printk()
> provides several other useful intermediate levels such as NOTICE and
> WARNING. So this patch fills out the set by providing both regular and
> once-only macros for each of the levels INFO, NOTICE, and WARNING, using
> a common underlying macro that does all the token-pasting.
> 
> DRM_ERROR is unchanged, as it's not just a printk wrapper.
> 
> Signed-off-by: Dave Gordon <david.s.gordon at intel.com>
> ---
>  include/drm/drmP.h | 26 ++++++++++++++++++++------
>  1 file changed, 20 insertions(+), 6 deletions(-)
> 
> diff --git a/include/drm/drmP.h b/include/drm/drmP.h
> index cf918e3e..82648b1 100644
> --- a/include/drm/drmP.h
> +++ b/include/drm/drmP.h
> @@ -162,6 +162,26 @@ void drm_err(const char *format, ...);
>  /** \name Macros to make printk easier */
>  /*@{*/
>  
> +#define	_DRM_PRINTK(once, level, fmt, ...)				\

Tab after `#define`?

> +	do {								\
> +		printk##once(KERN_##level "[" DRM_NAME "] " fmt,	\
> +			     ##__VA_ARGS__);				\
> +	} while (0)
> +
> +#define DRM_INFO(fmt, ...)						\
> +	_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
> +#define DRM_NOTE(fmt, ...)						\
> +	_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
> +#define DRM_WARN(fmt, ...)						\
> +	_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
> +
> +#define DRM_INFO_ONCE(fmt, ...)						\
> +	_DRM_PRINTK(_once, INFO, fmt, __VA_ARGS__)

Missing ## here; should be: ##__VA_ARGS__
The rest looks good.

Reviewed-by: Eric Engestrom <eric.engestrom at imgtec.com>

> +#define DRM_NOTE_ONCE(fmt, ...)					\
> +	_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
> +#define DRM_WARN_ONCE(fmt, ...)						\
> +	_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
> +
>  /**
>   * Error output.
>   *
> @@ -187,12 +207,6 @@ void drm_err(const char *format, ...);
>  		drm_err(fmt, ##__VA_ARGS__);				\
>  })
>  
> -#define DRM_INFO(fmt, ...)				\
> -	printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
> -
> -#define DRM_INFO_ONCE(fmt, ...)				\
> -	printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
> -
>  /**
>   * Debug output.
>   *
> -- 
> 1.9.1