Commit b427e765 authored Aug 13, 2020 by Xianting Tian Committed by Steven Rostedt (VMware) Sep 21, 2020

tracing: Use __this_cpu_read() in trace_buffered_event_enable()

The code is executed with preemption disabled, so it's
safe to use __this_cpu_read().

Link: https://lkml.kernel.org/r/20200813112803.12256-1-tian.xianting@h3c.com



Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

parent 5c8c206e

kernel/trace/trace.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2511,7 +2511,7 @@ void trace_buffered_event_enable(void)

		preempt_disable();
		if (cpu == smp_processor_id() &&
		this_cpu_read(trace_buffered_event) !=
		__this_cpu_read(trace_buffered_event) !=
		per_cpu(trace_buffered_event, cpu))
		WARN_ON_ONCE(1);
		preempt_enable();

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