On Tue, Jan 14, 2020 at 10:49 PM Pankaj Bharadiya
<pankaj.laxminarayan.bharadiya@xxxxxxxxx> wrote:
>
> Add new struct drm_device based WARN* macros. These are modeled after
> the core kernel device based WARN* macros. These would be preferred
> over the regular WARN* macros, where possible.
>
> These macros include device information in the backtrace, so we know
> what device the warnings originate from.
>
> Knowing the device specific information in the backtrace would be
> helpful in development all around.
>
> Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@xxxxxxxxx>
Acked-by: Sean Paul <sean@xxxxxxxxxx>
> ---
> include/drm/drm_print.h | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
> index 8f99d389792d..894a0b9437e2 100644
> --- a/include/drm/drm_print.h
> +++ b/include/drm/drm_print.h
> @@ -553,4 +553,33 @@ void __drm_err(const char *format, ...);
> #define DRM_DEBUG_PRIME_RATELIMITED(fmt, ...) \
> DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
>
> +/*
> + * struct drm_device based WARNs
> + *
> + * drm_WARN*() acts like WARN*(), but with the key difference of
> + * using device specific information so that we know from which device
> + * warning is originating from.
> + *
> + * Prefer drm_device based drm_WARN* over regular WARN*
> + */
> +
> +/* Helper for struct drm_device based WARNs */
> +#define drm_WARN(drm, condition, format, arg...) \
> + WARN(condition, "%s %s: " format, \
> + dev_driver_string((drm)->dev), \
> + dev_name((drm)->dev), ## arg)
> +
> +#define drm_WARN_ONCE(drm, condition, format, arg...) \
> + WARN_ONCE(condition, "%s %s: " format, \
> + dev_driver_string((drm)->dev), \
> + dev_name((drm)->dev), ## arg)
> +
> +#define drm_WARN_ON(drm, x) \
> + drm_WARN((drm), (x), "%s", \
> + "drm_WARN_ON(" __stringify(x) ")")
> +
> +#define drm_WARN_ON_ONCE(drm, x) \
> + drm_WARN_ONCE((drm), (x), "%s", \
> + "drm_WARN_ON_ONCE(" __stringify(x) ")")
> +
> #endif /* DRM_PRINT_H_ */
> --
> 2.23.0
>
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