With CONFIG_DRM_USE_DYNAMIC_DEBUG=y, I'm getting an unused variable warning/error on 'category', though the usage follows immediately, in drm_debug_enabled(). This drops the local var and refs the field directly in the macro-call, which avoids the warning. For static-key optimized dyndbg, the macro doesn't actually check the category, since the static-key patches in the proper state. This is also likely why the auto var appears to be unused by the compiler. commit 9fd6f61a297e ("drm/print: add drm_dbg_printer() for drm device specific printer") CC: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Jim Cromie <jim.cromie@gmail.com> --- drivers/gpu/drm/drm_print.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index c7455f2076b4..0980210a5146 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -183,11 +183,10 @@ void __drm_printfn_dbg(struct drm_printer *p, struct va_format *vaf) { const struct drm_device *drm = p->arg; const struct device *dev = drm ? drm->dev : NULL; - enum drm_debug_category category = p->category; const char *prefix = p->prefix ?: ""; const char *prefix_pad = p->prefix ? " " : ""; - if (!__drm_debug_enabled(category)) + if (!__drm_debug_enabled(p->category)) return; /* Note: __builtin_return_address(0) is useless here. */ -- 2.45.2