Messages in this thread Patch in this message | | | Date | Thu, 05 Jul 2018 21:06:07 -0400 | From | Steven Rostedt <> | Subject | [PATCH 3/6] tracing: Optimize trace_buffer_iter() logic |
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From: yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
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> --- kernel/trace/trace.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 630c5a24b2b2..f8f86231ad90 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -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); -- 2.17.1
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