From nobody Fri Dec 19 14:30:13 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 392E725F793; Tue, 8 Apr 2025 00:54:46 +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=1744073687; cv=none; b=fTz9qKzKqmNpAaE2GuWJ4+NRL3fn8N27lzNcZXvVtmzyxn5pC4Xli/uOx3vk4YgoP9yS+/J+Sjsp22IWRqZEKrJ5qep/o7yBqfkA2eqD+rpuW6DNhnuU289F10SbM/aFrvVrAeDOOzRM2EO9MsMvidT5s7YkTvqJ12xLcL+V6Gs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744073687; c=relaxed/simple; bh=uIclwtFQPhM45ra5x1CNBJS+U5d0woNUyIqzXH/gjpw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=EPJlguat9zxVyRSX46WcbQaGvWVzkY8hPfHU81K7KYZCx5i/LZyjUo83/Bpogl2XNHAilbRmKL+p9jBk3qhqCmW3veHgJjJFkQaiUEUrKr5Kiu/2ao/z4WP3WzLw8wM8tsNpQ8iaWxgRVSRoQJ6j8T1PjKMjEwFctJM7CNKIFhE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vJm3gbT1; 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="vJm3gbT1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86082C4CEDD; Tue, 8 Apr 2025 00:54:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744073686; bh=uIclwtFQPhM45ra5x1CNBJS+U5d0woNUyIqzXH/gjpw=; h=From:To:Cc:Subject:Date:From; b=vJm3gbT19A1BqO671ArzM/3w4vpvc6bDAI7ohB/B0ZSpuwQBzgM9sGCcNQ3NJfn+J 9u/gZFMDM0lDGM/U7rmRAg+Y+K40Nh9CRq/joj3MLGyrR2XOsoGgLm4ovOk6NC7JAV aThITcJRa4vP9DZTEMTMLTGz1WZTFsCymR0bofrlccuGcL4P4Ph4EtEPgTnZKBBHAp ZKgYTWU7k8e5qgzTnN2cr9PzKUvc153FliMORl5VRG+THGz3OI/WHEVGCBg+4W0fGf 4uKnu/NGn4a+7hKdWuyz+u+Yss5VYsSUf2ll7xizlha/9nqIJMDUHTPGJtxoA/SG+o JEskOPpI/peAA== 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, tj@kernel.org, masahiroy@kernel.org, mmaurer@google.com, yoann.congal@smile.fr, jeffxu@chromium.org, roman.gushchin@linux.dev, axboe@kernel.dk, chenridong@huawei.com, jannh@google.com, mark.rutland@arm.com, brgerst@gmail.com, vincent.guittot@linaro.org Subject: [PATCH AUTOSEL 5.4] sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP Date: Mon, 7 Apr 2025 20:54:37 -0400 Message-Id: <20250408005438.3335036-1-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 5.4.291 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 f641518f4ac5c..01beb047aff2f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -559,7 +559,7 @@ 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