From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-108.mta0.migadu.com [91.218.175.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2210516153 for ; Tue, 22 Sep 2026 07:20:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790061611; cv=none; b=RQZ+jWF/v6QNiUYlJsimYoF8vOk4hZz4sH9ocbN+Dh2Rq//0hAQMD2w7jGH0Wbra/NHpD7o06PlQpJTbmn363L/RiNNFp35uE2qTlB7GGruI1cW+ndJgHXfvyDugwmFpwzx5wFnOIE6FDY5YCsZfVBNbcnUMwlu/sDZlTsjxzO8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790061611; c=relaxed/simple; bh=EZ/YCaSPuiIHq9yuX+NfV7x2DltaVEKpXi2O9ZD9ZuQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=GCqUJn+WPbmbgKkWHOiLyMl9PC87QVX0ulhgMwJpwAMqfuBfL2AXJ4dt0lFPOvLnwB9MMGxB5s3JUZ5+BJSnvufIjBXtXHaBEao6RxGrq9PILechMHXX6Sp2QOQNxsQ9nHSFh/f9C0gs7wVoTvFJLGOzEB0h/N5e+BDW/LL4Q0U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=kIRggEQD; arc=none smtp.client-ip=91.218.175.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="kIRggEQD" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=EZ/YCaSPuiIHq9yuX+NfV7x2DltaVEKpXi2O9ZD9ZuQ=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1790061599; v=1; x=1790666399; b=kIRggEQDcs1UC/Cst/jynYBg/HQMkeKOgE0EOwKHH6ZUUcFyaflCKjkGRCstO5kArabqfFF2 RTL5cCH1iwL/pWn/sWuFMwVo2CcWYd6yJWw/qRhEFvWU5yCAn77kd+C8QNSA2bZ+khnQSTpI2LS 4iabQyLuUpPa0ZZxpDxeeRYk= X-Envelope-To: linux-kernel@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 3a52787b001092ab; Tue, 22 Sep 2026 07:19:59 +0000 X-Mizu-Trace-ID: 3a52787b001092ab X-Migadu-Flow: FLOW_OUT From: Fuad Tabba To: Paolo Bonzini , Sean Christopherson , Shuah Khan , Oliver Upton Cc: Tejun Heo , Johannes Weiner , =?UTF-8?q?Michal=20Koutn=C3=BD?= , James Houghton , Will Deacon , Fuad Tabba , kvm@vger.kernel.org, kvmarm@lists.linux.dev, cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] selftests/cgroup: Make the object directory an order-only prerequisite Date: Tue, 22 Sep 2026 08:19:45 +0100 Message-Id: <20260922071945.693714-3-fuad.tabba@linux.dev> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260922071945.693714-1-fuad.tabba@linux.dev> References: <20260922071945.693714-1-fuad.tabba@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit libcgroup.mk names $(LIBCGROUP_O_DIRS) as a regular prerequisite of cgroup_util.o. The directory's mtime moves whenever an object is created or replaced in it, so an incremental KVM selftests build that rebuilt anything in lib/ recompiles cgroup_util.o and relinks every test on the following run. Make the directory order-only, as libvfio.mk does. Fixes: 2c754a84ff16a ("cgroup: selftests: Move cgroup_util into its own library") Assisted-by: LLM Signed-off-by: Fuad Tabba --- tools/testing/selftests/cgroup/lib/libcgroup.mk | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/lib/libcgroup.mk b/tools/testing/selftests/cgroup/lib/libcgroup.mk index 7a73007204c39..bcf6fe2516223 100644 --- a/tools/testing/selftests/cgroup/lib/libcgroup.mk +++ b/tools/testing/selftests/cgroup/lib/libcgroup.mk @@ -13,7 +13,7 @@ EXTRA_HDRS := $(selfdir)/clone3/clone3_selftests.h $(LIBCGROUP_O_DIRS): mkdir -p $@ -$(LIBCGROUP_O): $(OUTPUT)/%.o : $(CGROUP_DIR)/%.c $(EXTRA_HDRS) $(LIBCGROUP_O_DIRS) +$(LIBCGROUP_O): $(OUTPUT)/%.o : $(CGROUP_DIR)/%.c $(EXTRA_HDRS) | $(LIBCGROUP_O_DIRS) $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@ EXTRA_CLEAN += $(LIBCGROUP_O) -- 2.39.5