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authorCai Huoqing <[email protected]>2022-01-14 14:03:10 -0800
committerLinus Torvalds <[email protected]>2022-01-15 16:30:24 +0200
commitff78f6679d2e223e073fcbdc8f70b6bc0abadf99 (patch)
tree0dcf3e641d2dc81842c46a3de5453a39851562f7
parent11e4e3523da98c065a6c249013ace0d388e41c25 (diff)
trace/hwlat: make use of the helper function kthread_run_on_cpu()
Replace kthread_create_on_cpu/wake_up_process() with kthread_run_on_cpu() to simplify the code. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Cai Huoqing <[email protected]> Cc: Bernard Metzler <[email protected]> Cc: Daniel Bristot de Oliveira <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: Doug Ledford <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Joel Fernandes (Google) <[email protected]> Cc: Josh Triplett <[email protected]> Cc: Lai Jiangshan <[email protected]> Cc: Mathieu Desnoyers <[email protected]> Cc: "Paul E . McKenney" <[email protected]> Cc: Steven Rostedt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r--kernel/trace/trace_hwlat.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index 56bb7b890578..d440ddd5fd8b 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;
}