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[2a02:3100:a8ab:f01:16a:c770:797f:eaee]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48ddbbd745dsm1013851f8f.15.2026.10.11.22.42.25 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 11 Oct 2026 22:42:25 -0700 (PDT) From: Karl Mehltretter To: Tejun Heo , Johannes Weiner , =?UTF-8?q?Michal=20Koutn=C3=BD?= Cc: Karl Mehltretter , Li Zefan , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] cgroup: Avoid warning when procfs is disabled Date: Mon, 12 Oct 2026 07:42:19 +0200 Message-Id: <20261012054219.13365-1-kmehltretter@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit With CGROUPS=y and PROC_FS=n, proc_create_single() returns NULL and cgroup initialization warns during every boot. Only check creation of /proc/cgroups when procfs is enabled. Fixes: 035f4f510583 ("cgroup: replace error handling in cgroup_init() with WARN_ON()s") Assisted-by: LLM Signed-off-by: Karl Mehltretter --- kernel/cgroup/cgroup.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 227d09704ca5..567afb75a4ec 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -6612,7 +6612,9 @@ int __init cgroup_init(void) WARN_ON(sysfs_create_mount_point(fs_kobj, "cgroup")); WARN_ON(register_filesystem(&cgroup_fs_type)); WARN_ON(register_filesystem(&cgroup2_fs_type)); - WARN_ON(!proc_create_single("cgroups", 0, NULL, proc_cgroupstats_show)); + if (IS_ENABLED(CONFIG_PROC_FS)) + WARN_ON(!proc_create_single("cgroups", 0, NULL, + proc_cgroupstats_show)); #ifdef CONFIG_CPUSETS_V1 WARN_ON(register_filesystem(&cpuset_fs_type)); #endif -- 2.53.0