From ce2910a453196930e7083aaf13240adcec160afd Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Fri, 17 Dec 2021 11:32:08 +0100 Subject: [PATCH 311/323] stop_machine: Remove this_cpu_ptr() from print_stop_info(). Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.204-rt100.tar.xz This aligns the patch ("stop_machine: Add function and caller debug info) with commit a8b62fd085050 ("stop_machine: Add function and caller debug info") that was merged upstream and is slightly different. Signed-off-by: Sebastian Andrzej Siewior --- kernel/stop_machine.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c index dbf585cf4b9f..971d8acceaec 100644 --- a/kernel/stop_machine.c +++ b/kernel/stop_machine.c @@ -51,7 +51,11 @@ static bool stop_machine_initialized = false; void print_stop_info(const char *log_lvl, struct task_struct *task) { - struct cpu_stopper *stopper = this_cpu_ptr(&cpu_stopper); + /* + * If @task is a stopper task, it cannot migrate and task_cpu() is + * stable. + */ + struct cpu_stopper *stopper = per_cpu_ptr(&cpu_stopper, task_cpu(task)); if (task != stopper->thread) return; -- 2.43.0