From: Cai Huoqing <caihuoqing@xxxxxxxxx> Subject: ring-buffer: make use of the helper function kthread_run_on_cpu() Replace kthread_create/kthread_bind/wake_up_process() with kthread_run_on_cpu() to simplify the code. Link: https://lkml.kernel.org/r/20211022025711.3673-4-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> --- kernel/trace/ring_buffer.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/kernel/trace/ring_buffer.c~ring-buffer-make-use-of-the-helper-function-kthread_run_on_cpu +++ a/kernel/trace/ring_buffer.c @@ -5898,16 +5898,13 @@ static __init int test_ringbuffer(void) rb_data[cpu].buffer = buffer; rb_data[cpu].cpu = cpu; rb_data[cpu].cnt = cpu; - rb_threads[cpu] = kthread_create(rb_test, &rb_data[cpu], - "rbtester/%d", cpu); + rb_threads[cpu] = kthread_run_on_cpu(rb_test, &rb_data[cpu], + cpu, "rbtester/%u"); if (WARN_ON(IS_ERR(rb_threads[cpu]))) { pr_cont("FAILED\n"); ret = PTR_ERR(rb_threads[cpu]); goto out_free; } - - kthread_bind(rb_threads[cpu], cpu); - wake_up_process(rb_threads[cpu]); } /* Now create the rb hammer! */ _
