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From: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
To: jani.nikula@intel.com, daniel@ffwll.ch, sam@ravnborg.org,
	sudeep.dutt@intel.com, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	David Airlie <airlied@linux.ie>
Cc: pankaj.laxminarayan.bharadiya@intel.com
Subject: [[Intel-gfx] [PATCH v2 01/10] drm/print: introduce new struct drm_device based WARN* macros
Date: Wed, 15 Jan 2020 09:13:58 +0530
Message-ID: <20200115034406.17549-2-pankaj.laxminarayan.bharadiya@intel.com> (raw)
In-Reply-To: <20200115034406.17549-1-pankaj.laxminarayan.bharadiya@intel.com>

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@intel.com>
---
 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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Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-15  3:43 [[Intel-gfx] [PATCH v2 00/10] drm: Introduce struct drm_device based WARN* and use them in i915 Pankaj Bharadiya
2020-01-15  3:43 ` Pankaj Bharadiya [this message]
2020-01-15  3:43 ` [[Intel-gfx] [PATCH v2 02/10] drm/i915/display: Make WARN* drm specific where drm_device ptr is available Pankaj Bharadiya
2020-01-15  3:44 [[Intel-gfx] [PATCH v2 00/10] drm: Introduce struct drm_device based WARN* and use them in i915 Pankaj Bharadiya
2020-01-15  3:44 ` [[Intel-gfx] [PATCH v2 01/10] drm/print: introduce new struct drm_device based WARN* macros Pankaj Bharadiya
2020-01-15 10:02   ` Jani Nikula
2020-01-21  8:39     ` Jani Nikula
2020-01-21  9:13       ` Sam Ravnborg
2020-01-22 13:30   ` [Intel-gfx] [ " Sean Paul
2020-01-22 15:32     ` Jani Nikula

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