[PATCH 34/65] drm-dyndbg: adapt drm core to use dyndbg classmaps-v2

[Jim Cromie]

dyndbg's CLASSMAP-v1 api was broken; DECLARE_DYNDBG_CLASSMAP tried to
do too much.  Its replaced by DRM_CLASSMAP_DEFINE, which creates &
EXPORTs the classmap when CONFIG_DRM_USE_DYNAMIC_DEBUG=y, for direct
reference by drivers.

The drivers still use DECLARE_DYNDBG_CLASSMAP for now, so they still
redundantly re-declare the classmap, but we can convert the drivers
later to DYNDBG_CLASSMAP_USE

Signed-off-by: Jim Cromie <jim.cromie at gmail.com>
---
this ignores a checkpatch
 WARNING: Argument 'name' is not used in function-like macro
 #70: FILE: include/drm/drm_print.h:148:
 +#define DRM_CLASSMAP_USE(name)

the macro is empty, and correct. only 1 arg is expected.
---
 drivers/gpu/drm/drm_print.c | 25 +++++++++++++------------
 include/drm/drm_print.h     |  8 ++++++++
 2 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index cf24dfdeb6b2..8158c2185ab3 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -55,18 +55,19 @@ MODULE_PARM_DESC(debug, "Enable debug output, where each bit enables a debug cat
 #if !defined(CONFIG_DRM_USE_DYNAMIC_DEBUG)
 module_param_named(debug, __drm_debug, ulong, 0600);
 #else
-/* classnames must match vals of enum drm_debug_category */
-DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
-			"DRM_UT_CORE",
-			"DRM_UT_DRIVER",
-			"DRM_UT_KMS",
-			"DRM_UT_PRIME",
-			"DRM_UT_ATOMIC",
-			"DRM_UT_VBL",
-			"DRM_UT_STATE",
-			"DRM_UT_LEASE",
-			"DRM_UT_DP",
-			"DRM_UT_DRMRES");
+/* classnames must match value-symbols of enum drm_debug_category */
+DRM_CLASSMAP_DEFINE(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS,
+		    DRM_UT_CORE,
+		    "DRM_UT_CORE",
+		    "DRM_UT_DRIVER",
+		    "DRM_UT_KMS",
+		    "DRM_UT_PRIME",
+		    "DRM_UT_ATOMIC",
+		    "DRM_UT_VBL",
+		    "DRM_UT_STATE",
+		    "DRM_UT_LEASE",
+		    "DRM_UT_DP",
+		    "DRM_UT_DRMRES");
 
 static struct ddebug_class_param drm_debug_bitmap = {
 	.bits = &__drm_debug,
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h
index 5d9dff5149c9..e6b45e8a39e6 100644
--- a/include/drm/drm_print.h
+++ b/include/drm/drm_print.h
@@ -140,6 +140,14 @@ enum drm_debug_category {
 	DRM_UT_DRMRES
 };
 
+#ifdef CONFIG_DRM_USE_DYNAMIC_DEBUG
+#define DRM_CLASSMAP_DEFINE(...) DYNDBG_CLASSMAP_DEFINE(__VA_ARGS__)
+#define DRM_CLASSMAP_USE(name)   DYNDBG_CLASSMAP_USE(name)
+#else
+#define DRM_CLASSMAP_DEFINE(...)
+#define DRM_CLASSMAP_USE(name)
+#endif
+
 static inline bool drm_debug_enabled_raw(enum drm_debug_category category)
 {
 	return unlikely(__drm_debug & BIT(category));
-- 
2.46.2