[PATCH -next] tracing: Fix return value check in trace_benchmark_reg()

From: Wei Yongjun
Date: Thu Jan 12 2017 - 08:55:12 EST


From: Wei Yongjun <weiyongjun1@xxxxxxxxxx>

In case of error, the function kthread_run() returns ERR_PTR() and never
returns NULL. The NULL test in the return value check should be replaced
with IS_ERR().

Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
kernel/trace/trace_benchmark.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_benchmark.c b/kernel/trace/trace_benchmark.c
index e3b4888..e49fbe9 100644
--- a/kernel/trace/trace_benchmark.c
+++ b/kernel/trace/trace_benchmark.c
@@ -175,9 +175,9 @@ int trace_benchmark_reg(void)

bm_event_thread = kthread_run(benchmark_event_kthread,
NULL, "event_benchmark");
- if (!bm_event_thread) {
+ if (IS_ERR(bm_event_thread)) {
pr_warning("trace benchmark failed to create kernel thread\n");
- return -ENOMEM;
+ return PTR_ERR(bm_event_thread);
}

return 0;