From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 83E0A3C819E for ; Thu, 21 May 2026 13:47:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779371226; cv=none; b=AyV5lQaECgh1hz8aF1y8r/zK4aHTuAlUpREzUAAhKvD/ZhyRuBD9gD/AjHfIPI89+THzophNpJAP1n+oUn5cIL2uD/m8Ab+f34bFprFPESDVDw/NcvvEvIeMM9KBOIakAGeh5G7Llo8T8KziFht6DUcN3/TIS3ARyUotkXmdm2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779371226; c=relaxed/simple; bh=uslIoqmzcEZWtww7upAqRcFT35B1VWlcNAGmLw/xnsU=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=tzKCHMrK17duX/yTi9/1JSaFRI3DyBGdtduYYTzPNgrisMcdZDyKhx6+d6B54tm8WJyFHrMqmGAoFghhJUkX7ha0kVxUosq1kkspjRhS03U0/R3AT4XZKn2Dlp0oGgiYf7KzvOSSaU8aGSPxMmkUMiaHtUCtmxjBrxnRtiW524o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Eto/MGFw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Eto/MGFw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71F881F00A3E; Thu, 21 May 2026 13:47:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779371224; bh=Rmd81ZKl/0JPJy3Z/bsvNjMegsIAuD7HYU0yoOfNNDs=; h=Date:From:To:Cc:Subject:References; b=Eto/MGFwwuvK2wtwKF5U2F56D8MrBn5FHfT8rfjyfrgVqW8WbZn8YzNivzmNUpXmi uIgh2wQuErW1fJGUhLaaOXX2lXJLdG5u7QsKLv3hmG3cwJqnhv8JIISmsrdH4HFbDU tukJocVrjUXP7sIzb+PVp3xxrSQ2cO2I8T2X5rf0/AT3rT/nAFrxKBUCmX1FMLuCXQ uCKM7DrVA5zrIRtL66A4eiHTK4qQkyrKm1TTkQAY18KdabyIEw/erL+Jr/WxhzqCPd qAjhyiHUPUvMkOtjNhAmfp1fnO2jfF6JVDZlMo4iiACMjw7CDz4VmhOVDPdtB7r4Jg R1Th0Y6ydgLcQ== Received: from rostedt by gandalf with local (Exim 4.99.2) (envelope-from ) id 1wQ3kD-00000005MSS-3G6O; Thu, 21 May 2026 09:47:25 -0400 Message-ID: <20260521134725.646411250@kernel.org> User-Agent: quilt/0.69 Date: Thu, 21 May 2026 09:47:15 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Vincent Donnefort , Marc Zyngier , Arnd Bergmann , Nathan Chancellor , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= Subject: [for-linus][PATCH 5/5] tracing: Create output file from cmd_check_undefined References: <20260521134710.628917428@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= As the output file is currently never created, the check will run every time, even if the inputs have not changed. Create an empty output file which allows make to skip the execution when it is not necessary. Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Cc: Vincent Donnefort Cc: Marc Zyngier Cc: Arnd Bergmann Link: https://patch.msgid.link/20260520-tracing-ringbuffer-check-v1-1-d979cfab1338@weissschuh.net Fixes: 1211907ac0b5 ("tracing: Generate undef symbols allowlist for simple_ring_buffer") Fixes: 58b4bd18390e ("tracing: Adjust cmd_check_undefined to show unexpected undefined symbols") Reviewed-by: Nathan Chancellor Tested-by: Nathan Chancellor Signed-off-by: Thomas Weißschuh Signed-off-by: Steven Rostedt --- kernel/trace/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 9b0834134cae..8d3d96e847d8 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -154,7 +154,8 @@ quiet_cmd_check_undefined = NM $< echo "Unexpected symbols in $<:" >&2; \ echo "$$undefsyms" >&2; \ false; \ - fi + fi; \ + touch $@ $(obj)/%.o.checked: $(obj)/%.o $(obj)/undefsyms_base.o FORCE $(call if_changed,check_undefined) -- 2.53.0