From nobody Fri Dec 19 04:29:42 2025 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 C07EB25F78A; Tue, 8 Apr 2025 00:54:29 +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=1744073669; cv=none; b=NbHb1KXum7YESarPOuwUZsBMU2kMd/jgKZgSovSthaxT68jIEwBQxQWTVK+79OUTHCqy9hyBU79OqRbBCuQw5V4TRaNB2ZohWkgHQ8w2g8RB4avustmpJVxMxAddYX/apLMPl9zmSSObXlinMlewibv5ZC7JQTC0fOvqNcdDKjQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744073669; c=relaxed/simple; bh=+QwO1WLnO79Bu7Zo5cxOUyEMBOqZlMWoTt+shk687wk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=U7+eVYPyBCo0DK1276J7wVSTCxlDbC4qlnymJQJsWom0DkQl+9f0ZKSV9PbY3L7NCA6CmlTxL4iDa2rbr2Jb3PFJdj+Z8VkE1mHCdAc+/2SB6AKztz7sHFQNr+opTogws8Q/S74EVpX3w63Avx8bFdteHtWgc6xuH3gkcINVvpg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LL9lq5dd; 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="LL9lq5dd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 219FFC4CEE8; Tue, 8 Apr 2025 00:54:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744073669; bh=+QwO1WLnO79Bu7Zo5cxOUyEMBOqZlMWoTt+shk687wk=; h=From:To:Cc:Subject:Date:From; b=LL9lq5ddAion7TfNYvlhBE6d2ksG4ckHS3BQvqKowffHmaRju3UJWfzPUHi42ItCr CyJt1+KT9huOpMT33BVhE0TQRH71ByR2dUET2+c4cuySSC0lqlM2SzRXwexwwPcI1H vF2S72wVTBdDpvZ0TEzsNoPLRgSAeKE7jCVPJJ0WRQaJW7l6+fPhB5MLhafxh4PzTf RWIsYEHeRKx9Krd4grPICjwf32sNAb/U34lbG6an7xm+QsiRg7TSPnbGrQ2yT2Wq78 KBxbT+IGjGuN1YioX4hPi3oV91w2b8uuUFKMEEKfhbeMKlJEcyKvKF5PeG1tyIAOTA xPoTSIebSWOfg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Oleg Nesterov , kernel test robot , Ingo Molnar , Sasha Levin , ojeda@kernel.org, aliceryhl@google.com, akpm@linux-foundation.org, masahiroy@kernel.org, tj@kernel.org, mmaurer@google.com, yoann.congal@smile.fr, jeffxu@chromium.org, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, jannh@google.com, mark.rutland@arm.com, vincent.guittot@linaro.org, brgerst@gmail.com Subject: [PATCH AUTOSEL 5.15] sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP Date: Mon, 7 Apr 2025 20:54:23 -0400 Message-Id: <20250408005424.3334978-1-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.15.179 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Oleg Nesterov [ Upstream commit 975776841e689dd8ba36df9fa72ac3eca3c2957a ] kernel/sched/isolation.c obviously makes no sense without CONFIG_SMP, but the Kconfig entry we have right now: config CPU_ISOLATION bool "CPU isolation" depends on SMP || COMPILE_TEST allows the creation of pointless .config's which cause build failures. Reported-by: kernel test robot Signed-off-by: Oleg Nesterov Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20250330134955.GA7910@redhat.com Closes: https://lore.kernel.org/oe-kbuild-all/202503260646.lrUqD3j5-lkp@int= el.com/ Signed-off-by: Sasha Levin --- init/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/init/Kconfig b/init/Kconfig index dafc3ba6fa7a1..c7d81fc823964 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -674,7 +674,7 @@ endmenu # "CPU/Task time and stats accounting" =20 config CPU_ISOLATION bool "CPU isolation" - depends on SMP || COMPILE_TEST + depends on SMP default y help Make sure that CPUs running critical tasks are not disturbed by --=20 2.39.5