From: Cai Huoqing caihuoqing@baidu.com
[ 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@baidu.com Signed-off-by: Cai Huoqing caihuoqing@baidu.com Cc: Bernard Metzler bmt@zurich.ibm.com Cc: Daniel Bristot de Oliveira bristot@kernel.org Cc: Davidlohr Bueso dave@stgolabs.net Cc: Doug Ledford dledford@redhat.com Cc: Ingo Molnar mingo@redhat.com Cc: Jason Gunthorpe jgg@ziepe.ca Cc: Joel Fernandes (Google) joel@joelfernandes.org Cc: Josh Triplett josh@joshtriplett.org Cc: Lai Jiangshan jiangshanlai@gmail.com Cc: Mathieu Desnoyers mathieu.desnoyers@efficios.com Cc: "Paul E . McKenney" paulmck@kernel.org Cc: Steven Rostedt rostedt@goodmis.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Stable-dep-of: 08697bca9bbb ("trace/hwlat: Do not start per-cpu thread if it is already running") Signed-off-by: Sasha Levin sashal@kernel.org --- 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; }