dyndbg's CLASSMAP-v1 api was broken; DECLARE_DYNDBG_CLASSMAP tried to do too much. Its replaced by DYNAMIC_DEBUG_CLASSMAP_DEFINE which creates & EXPORTs a classmap, and DYNAMIC_DEBUG_CLASSMAP_USE which refers to that exported classmap, creating a module dependency. DRM gets DRM_CLASSMAP_* wrappers to hide the DRM_USE_DYNAMIC_DEBUG ifdef.
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, at which point they'll respond to the echo class FOO >control commands. Signed-off-by: Jim Cromie <[email protected]> Reviewed-by: Louis Chauvet <[email protected]> --- this ignored 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. v++: fix old CLASSBITS/CLASSMAP comment --- drivers/gpu/drm/drm_print.c | 25 +++++++++++++------------ include/drm/drm_print.h | 13 ++++++++++++- 2 files changed, 25 insertions(+), 13 deletions(-) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index ded9461df5f2..d07e7953c9fc 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -56,18 +56,19 @@ 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 ab017b05e175..b743ee3f8f5e 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -96,7 +96,10 @@ extern unsigned long __drm_debug; * */ enum drm_debug_category { - /* These names must match those in DYNAMIC_DEBUG_CLASSBITS */ + /* + * These enum-names are reused in DRM_CLASSMAP_DEFINE to + * expose them as classes in /proc/dynamic_debug/control + */ /** * @DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, * drm_memory.c, ... @@ -141,6 +144,14 @@ enum drm_debug_category { DRM_UT_DRMRES }; +#ifdef CONFIG_DRM_USE_DYNAMIC_DEBUG +#define DRM_CLASSMAP_DEFINE(...) DYNAMIC_DEBUG_CLASSMAP_DEFINE(__VA_ARGS__) +#define DRM_CLASSMAP_USE(name) DYNAMIC_DEBUG_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)); -- 2.53.0
