The patch titled
Subject: ring-buffer: make use of the helper function kthread_run_on_cpu()
has been added to the -mm tree. Its filename is
ring-buffer-make-use-of-the-helper-function-kthread_run_on_cpu.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/ring-buffer-make-use-of-the-helper-function-kthread_run_on_cpu.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/ring-buffer-make-use-of-the-helper-function-kthread_run_on_cpu.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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! */
_
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
