From: Xianting Tian Date: Thu, 13 Aug 2020 11:28:03 +0000 (+0800) Subject: tracing: Use __this_cpu_read() in trace_buffered_event_enable() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b427e765bdffcc18911ace199a17b09332a47d55;p=linux.git 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 Signed-off-by: Steven Rostedt (VMware) --- diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 8fac7d6db222e..1c4ca25944ba5 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -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();