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From:   Cai Huoqing <caihuoqing@baidu.com>
To:     <caihuoqing@baidu.com>
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Subject: [PATCH 6/6] trace/hwlat: Make use of the helper macro kthread_run_on_cpu()
Date:   Thu, 21 Oct 2021 20:01:35 +0800
Message-ID: <20211021120135.3003-7-caihuoqing@baidu.com>
In-Reply-To: <20211021120135.3003-1-caihuoqing@baidu.com>
References: <20211021120135.3003-1-caihuoqing@baidu.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Repalce kthread_create/kthread_bind/wake_up_process()
with kthread_run_on_cpu() to simplify the code.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
---
 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 1b83d75eb103..0e555335f095 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;
 }
-- 
2.25.1