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Date: Mon, 11 Jan 2021 18:51:29 -0500 From: Steven Rostedt <rostedt@...dmis.org> To: Qiujun Huang <hqjagain@...il.com> Cc: mingo@...hat.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2] trace: Remove get/put_cpu() from function_trace_init On Wed, 30 Dec 2020 22:05:21 +0800 Qiujun Huang <hqjagain@...il.com> wrote: > Since commit b6f11df26fdc ("trace: Call tracing_reset_online_cpus before > tracer->init()"), get/put_cpu() are not needed anymore. > We can use raw_smp_processor_id() instead. I added both your patches (this one and the trace_ignore_this_task() kernel-doc fix to my queue. Thanks! -- Steve > > Signed-off-by: Qiujun Huang <hqjagain@...il.com> > --- > v2: > Use raw_smp_processor_id() instead of smp_processor_id() > --- > kernel/trace/trace_functions.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c > index c5095dd28e20..f67aec5bb771 100644 > --- a/kernel/trace/trace_functions.c > +++ b/kernel/trace/trace_functions.c > @@ -106,8 +106,7 @@ static int function_trace_init(struct trace_array *tr) > > ftrace_init_array_ops(tr, func); > > - tr->array_buffer.cpu = get_cpu(); > - put_cpu(); > + tr->array_buffer.cpu = raw_smp_processor_id(); > > tracing_start_cmdline_record(); > tracing_start_function_trace(tr);
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