enum drm_debug_category has 10 categories, but is initialized with bitmasks which require 10 bits of underlying storage. By using natural enumeration, and moving the BIT(cat) into drm_debug_enabled(), the enum fits in 4 bits, allowing the category to be represented directly in pr_debug callsites, via the ddebug.class_id field.
While this slightly pessimizes the bit-test in drm_debug_enabled(), using dyndbg with JUMP_LABEL will avoid the function entirely.
NOTE: this change forecloses the possibility of doing:
drm_dbg(DRM_UT_CORE|DRM_UT_KMS, "weird 2-cat experiment")
but thats already strongly implied by the use of the enum itself; its not a normal enum if it can be 2 values simultaneously.
Signed-off-by: Jim Cromie jim.cromie@gmail.com --- include/drm/drm_print.h | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index 0597137bac75..a157485bf573 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -284,49 +284,49 @@ enum drm_debug_category { * @DRM_UT_CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, * drm_memory.c, ... */ - DRM_UT_CORE = 0x01, + DRM_UT_CORE, /** * @DRM_UT_DRIVER: Used in the vendor specific part of the driver: i915, * radeon, ... macro. */ - DRM_UT_DRIVER = 0x02, + DRM_UT_DRIVER, /** * @DRM_UT_KMS: Used in the modesetting code. */ - DRM_UT_KMS = 0x04, + DRM_UT_KMS, /** * @DRM_UT_PRIME: Used in the prime code. */ - DRM_UT_PRIME = 0x08, + DRM_UT_PRIME, /** * @DRM_UT_ATOMIC: Used in the atomic code. */ - DRM_UT_ATOMIC = 0x10, + DRM_UT_ATOMIC, /** * @DRM_UT_VBL: Used for verbose debug message in the vblank code. */ - DRM_UT_VBL = 0x20, + DRM_UT_VBL, /** * @DRM_UT_STATE: Used for verbose atomic state debugging. */ - DRM_UT_STATE = 0x40, + DRM_UT_STATE, /** * @DRM_UT_LEASE: Used in the lease code. */ - DRM_UT_LEASE = 0x80, + DRM_UT_LEASE, /** * @DRM_UT_DP: Used in the DP code. */ - DRM_UT_DP = 0x100, + DRM_UT_DP, /** * @DRM_UT_DRMRES: Used in the drm managed resources code. */ - DRM_UT_DRMRES = 0x200, + DRM_UT_DRMRES };
static inline bool drm_debug_enabled(enum drm_debug_category category) { - return unlikely(__drm_debug & category); + return unlikely(__drm_debug & BIT(category)); }
/*