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[v4,40/41] nouveau-dbg: fixup lost prdbgs

Message ID 20220720153233.144129-41-jim.cromie@gmail.com (mailing list archive)
State New, archived
Headers show
Series DYNDBG: opt-in class'd debug for modules, use in drm. | expand

Commit Message

Jim Cromie July 20, 2022, 3:32 p.m. UTC 
Undo the 1-line change that reduced count of prdbgs from 632 to 119.

ie: s/NV_SUBDEV_DBG_##l/NV_DBG_##l/

So heres what happened: new symbol is 15 (or 10), and fails this macro
test, so gets compiled out, and the dev_dbg is excluded.

        if (CONFIG_NOUVEAU_DEBUG >= (l) && _subdev->debug >= (l))       \
                dev_dbg(_subdev->device->dev, "%s: "f, _subdev->name, ##a); \

I could hack this, by hardcoding in (l + #base), but base is pretty
distant to just toss into the macro.  At least, the base-ref should be
a macro(&classmap) properly exposing it.

OTOH, the whole CONFIG_NOUVEAU_DEBUG check could be reworked; given
that trace is minumum recommended, theres not that many callsites
elided (SPAM only iirc) at compile-time, and dyndbg means keeping them
has "zero" run=cost (and 56 bytes per).  So this config item doesnt do
much when DRM_USE_DYNAMIC_DEBUG=y.

So this is a useful place to stop and take another look around, try to
guess which trail to take..

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
 drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h b/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h
index bf9c69f4fc3e..d5f6ca05d5fa 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h
@@ -66,7 +66,7 @@  void nvkm_subdev_intr(struct nvkm_subdev *);
 	if (CONFIG_NOUVEAU_DEBUG >= (l) && _subdev->debug >= (l))	\
 		dev_dbg(_subdev->device->dev, "%s: "f, _subdev->name, ##a); \
 } while(0)
-#define nvkm_drmdbg_(s,l,f,a...) nvkm_drmdbg__((s), NV_SUBDEV_DBG_##l, dbg, f, ##a)
+#define nvkm_drmdbg_(s,l,f,a...) nvkm_drmdbg__((s), NV_DBG_##l, dbg, f, ##a)
 #define nvkm_debug(s,f,a...) nvkm_drmdbg_((s), DEBUG, f, ##a)
 #define nvkm_trace(s,f,a...) nvkm_drmdbg_((s), TRACE, f, ##a)
 #define nvkm_spam(s,f,a...)  nvkm_drmdbg_((s),  SPAM, f, ##a)