diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace_benchmark.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/kernel/trace/trace_benchmark.c b/kernel/trace/trace_benchmark.c index f76d0416dd83..2bc7dc3e8ff8 100644 --- a/kernel/trace/trace_benchmark.c +++ b/kernel/trace/trace_benchmark.c @@ -166,9 +166,18 @@ static int benchmark_event_kthread(void *arg) */ int trace_benchmark_reg(void) { + if (system_state != SYSTEM_RUNNING) { + pr_warning("trace benchmark cannot be started via kernel command line\n"); + return -EBUSY; + } + bm_event_thread = kthread_run(benchmark_event_kthread, NULL, "event_benchmark"); - WARN_ON(!bm_event_thread); + if (!bm_event_thread) { + pr_warning("trace benchmark failed to create kernel thread\n"); + return -ENOMEM; + } + return 0; } @@ -183,6 +192,7 @@ void trace_benchmark_unreg(void) return; kthread_stop(bm_event_thread); + bm_event_thread = NULL; strcpy(bm_str, "START"); bm_total = 0; |