From nobody Wed Feb 11 07:48:36 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7C75C324B0B for ; Mon, 27 Oct 2025 20:13:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761595990; cv=none; b=GF+ssiq7OpXXfySuT+evDp+2VarP/DSdss6nkmSYmlwFlpKwFZ14lavMX5sMpVkC86j+4CsKf+unC/wa8cgXcxdOP2XVLPIPot2qJlIMRiZ+JQR7L0LWhNCC1qAZSSS0L3v8iCD/sOyyxrdVWF6uGJMGo6Zv19Baj/N8jGh3uuc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761595990; c=relaxed/simple; bh=91E83ZijfHm0ABFXcEmjFJO6wE4SNSNgOyqdt3N4Qhk=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=kAX6H6yNs9YPjJ/knxHYMqs1BYxcKdQ1VL6s2uz4KBfPnuYVrelCk3fhsfaOYoxFXZM/+pLLDbCjBgGNJT63rvt9HACqtj/Lw2rGfdvsiSu1rOjr16i/iAtXuea9pc1tFQ78LtVt6KFRL+r0787cMEKUE7G8/r6DLsHT+ua30sE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=e+as1HHm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="e+as1HHm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43581C16AAE; Mon, 27 Oct 2025 20:13:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761595990; bh=91E83ZijfHm0ABFXcEmjFJO6wE4SNSNgOyqdt3N4Qhk=; h=Date:From:To:Cc:Subject:References:From; b=e+as1HHm1QC0VY/sCrL7Y7W0gQoDj08xm0WncSSfXuM/MrgsHajXyYRXIccDlJAw0 jadWKc/CbCDuT3s7tgnU0ldd+evTRflxs5PSLXpbM9iwFbefG3Nh7Tte4RcvIgqlzf rRYq2ARiXxFxPgGXL3tSbVfbL6bJbhtwr05+Jqzcl8JC6W4DbXfs7oL8sXshjjz2WV jrY1jdmVLXCt1NlszzgVYs/NZFXkA+kR9iMyOMbNMmxNTRzLP12TakqasnnMXYOCar 7epLlpp7Usi1mh1ceOZcz2LglANCQj3Lwl+eqJkty0Yy69DHoLcJwAmg2gA0HbTGRT tNIeGhIcPWENQ== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1vDTb8-00000004PoX-3xSS; Mon, 27 Oct 2025 16:13:46 -0400 Message-ID: <20251027201346.791511994@kernel.org> User-Agent: quilt/0.68 Date: Mon, 27 Oct 2025 16:13:30 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Arnd Bergmann , Masahiro Yamada , Nathan Chancellor , Nicolas Schier , Nick Desaulniers , Catalin Marinas , Linus Torvalds , Randy Dunlap , Stephen Rothwell Subject: [for-next][PATCH 5/5] tracing: Add warnings for unused tracepoints for modules References: <20251027201325.076180660@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Steven Rostedt If a modules has TRACE_EVENT() but does not use it, add a warning about it at build time. Currently, the build must be made by adding "UT=3D1" to the make command line in order for this to trigger. Cc: Masami Hiramatsu Cc: Mark Rutland Cc: Mathieu Desnoyers Cc: Andrew Morton Cc: Arnd Bergmann Cc: Masahiro Yamada Cc: Nathan Chancellor Cc: Nicolas Schier Cc: Nick Desaulniers Cc: Catalin Marinas Cc: Linus Torvalds Cc: Randy Dunlap Cc: Stephen Rothwell Link: https://lore.kernel.org/20251022004453.422000794@kernel.org Signed-off-by: Steven Rostedt (Google) --- scripts/Makefile.modfinal | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal index 542ba462ed3e..149e12ff5700 100644 --- a/scripts/Makefile.modfinal +++ b/scripts/Makefile.modfinal @@ -28,6 +28,10 @@ ccflags-remove-y :=3D $(CC_FLAGS_CFI) .module-common.o: $(srctree)/scripts/module-common.c FORCE $(call if_changed_rule,cc_o_c) =20 +ifneq ($(WARN_ON_UNUSED_TRACEPOINTS),) +cmd_check_tracepoint =3D $(objtree)/scripts/tracepoint-update --module $<; +endif + quiet_cmd_ld_ko_o =3D LD [M] $@ cmd_ld_ko_o =3D \ $(LD) -r $(KBUILD_LDFLAGS) \ @@ -57,6 +61,7 @@ if_changed_except =3D $(if $(call newer_prereqs_except,$(= 2))$(cmd-check), \ ifdef CONFIG_DEBUG_INFO_BTF_MODULES +$(if $(newer-prereqs),$(call cmd,btf_ko)) endif + +$(call cmd,check_tracepoint) =20 targets +=3D $(modules:%.o=3D%.ko) $(modules:%.o=3D%.mod.o) .module-common= .o =20 --=20 2.51.0