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tracing: Optimize trace_buffer_iter() logic

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Simplify and optimize the logic in trace_buffer_iter() to use a conditional
operation instead of an if conditional.

Link: http://lkml.kernel.org/r/20180408113631.3947-1-cugyly@163.com

Signed-off-by: yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
yuan linyu 2018-04-08 19:36:31 +08:00 committed by Steven Rostedt (VMware)
parent f90658725b
commit f26808ba72
1 changed files with 1 additions and 3 deletions
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4
kernel/trace/trace.h
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@ -583,9 +583,7 @@ static __always_inline void trace_clear_recursion(int bit)
static inline struct ring_buffer_iter *
trace_buffer_iter(struct trace_iterator *iter, int cpu)
{
if (iter->buffer_iter && iter->buffer_iter[cpu])
return iter->buffer_iter[cpu];
return NULL;
return iter->buffer_iter ? iter->buffer_iter[cpu] : NULL;
}
int tracer_init(struct tracer *t, struct trace_array *tr);