previous code can make unused variable warning, e.g. when CONFIG_DRM_USE_DYNAMIC_DEBUG is set, this outputs the following build error. drivers/gpu/drm/drm_print.c: In function ‘__drm_printfn_dbg’: drivers/gpu/drm/drm_print.c:218:33: error: unused variable ‘category’ [-Werror=unused-variable] 218 | enum drm_debug_category category = p->category; so i simply add '(void)(category);' to remove unused variable warning, by referring to "https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html";. Signed-off-by: Gyeyoung Baek <gye976@xxxxxxxxx> --- include/drm/drm_print.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index d2676831d765..6a5dc1f73ff2 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -157,7 +157,7 @@ static inline bool drm_debug_enabled_raw(enum drm_debug_category category) * a descriptor, and only enabled callsites are reachable. They use * the private macro to avoid re-testing the enable-bit. */ -#define __drm_debug_enabled(category) true +#define __drm_debug_enabled(category) ({ (void)(category); true; }) #define drm_debug_enabled(category) drm_debug_enabled_instrumented(category) #else #define __drm_debug_enabled(category) drm_debug_enabled_raw(category) -- 2.34.1
