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Thu, 02 Apr 2026 21:09:22 -0700 (PDT) Received: from eric-wcnlab.tail151456.ts.net ([2001:288:7001:1099:566e:8ca1:fcf3:4f49]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b2749cbd85sm42055915ad.74.2026.04.02.21.09.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Apr 2026 21:09:22 -0700 (PDT) From: Cheng-Yang Chou To: sched-ext@lists.linux.dev, Tejun Heo , David Vernet , Andrea Righi , Changwoo Min Cc: Ching-Chun Huang , Chia-Ping Tsai , yphbchou0911@gmail.com, kernel test robot Subject: [PATCH] sched_ext: Fix print_scx_info() build error on !CONFIG_EXT_SUB_SCHED kernels Date: Fri, 3 Apr 2026 12:09:03 +0800 Message-ID: <20260403040913.610756-2-yphbchou0911@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20260403040913.610756-1-yphbchou0911@gmail.com> References: <20260403040913.610756-1-yphbchou0911@gmail.com> Precedence: bulk X-Mailing-List: sched-ext@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit scx_task_sched_rcu() is only available when CONFIG_EXT_SUB_SCHED is enabled. Wrap the call with #ifdef CONFIG_EXT_SUB_SCHED and fall back to rcu_dereference(scx_root) for the non-sub-sched case, which is semantically equivalent. Fixes: 60d4b17e886a ("sched_ext: Choose the right sch->ops.name to output in the print_scx_info()") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202603261453.8kiJImYo-lkp@intel.com/ Signed-off-by: Cheng-Yang Chou --- kernel/sched/ext.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 551bfb99157d..a40edd4d7cd9 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -7689,7 +7689,11 @@ void print_scx_info(const char *log_lvl, struct task_struct *p) guard(rcu)(); +#ifdef CONFIG_EXT_SUB_SCHED sch = scx_task_sched_rcu(p); +#else + sch = rcu_dereference(scx_root); +#endif if (!sch) return; -- 2.48.1