The patch titled
Subject: trace/hwlat: make use of the helper function kthread_run_on_cpu()
has been added to the -mm tree. Its filename is
trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu.patch
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------------------------------------------------------
From: Cai Huoqing <caihuoqing@xxxxxxxxx>
Subject: 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/20211022025711.3673-7-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/trace_hwlat.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
--- a/kernel/trace/trace_hwlat.c~trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu
+++ a/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;
}
_
Patches currently in -mm which might be from caihuoqing@xxxxxxxxx are
kthread-add-the-helper-function-kthread_run_on_cpu.patch
rdma-siw-make-use-of-the-helper-function-kthread_run_on_cpu.patch
ring-buffer-make-use-of-the-helper-function-kthread_run_on_cpu.patch
rcutorture-make-use-of-the-helper-function-kthread_run_on_cpu.patch
trace-osnoise-make-use-of-the-helper-function-kthread_run_on_cpu.patch
trace-hwlat-make-use-of-the-helper-function-kthread_run_on_cpu.patch
