From: Cai Huoqing <caihuoqing@xxxxxxxxx> [ Upstream commit ff78f6679d2e223e073fcbdc8f70b6bc0abadf99 ] Replace kthread_create_on_cpu/wake_up_process() with kthread_run_on_cpu() to simplify the code. Link: https://lkml.kernel.org/r/20211022025711.3673-7-caihuoqing@xxxxxxxxx Signed-off-by: Cai Huoqing <caihuoqing@xxxxxxxxx> Cc: Bernard Metzler <bmt@xxxxxxxxxxxxxx> Cc: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx> Cc: Doug Ledford <dledford@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Jason Gunthorpe <jgg@xxxxxxxx> Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx> Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx> Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Cc: "Paul E . McKenney" <paulmck@xxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Stable-dep-of: 08697bca9bbb ("trace/hwlat: Do not start per-cpu thread if it is already running") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- kernel/trace/trace_hwlat.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c index 455f5edf008b8..72eeab938f1de 100644 --- a/kernel/trace/trace_hwlat.c +++ b/kernel/trace/trace_hwlat.c @@ -491,18 +491,14 @@ static void stop_per_cpu_kthreads(void) static int start_cpu_kthread(unsigned int cpu) { struct task_struct *kthread; - char comm[24]; - snprintf(comm, 24, "hwlatd/%d", cpu); - - kthread = kthread_create_on_cpu(kthread_fn, NULL, cpu, comm); + kthread = kthread_run_on_cpu(kthread_fn, NULL, cpu, "hwlatd/%u"); if (IS_ERR(kthread)) { pr_err(BANNER "could not start sampling thread\n"); return -ENOMEM; } per_cpu(hwlat_per_cpu_data, cpu).kthread = kthread; - wake_up_process(kthread); return 0; } -- 2.39.2
