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| author | yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn> | 2018-04-08 19:36:31 +0800 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2018-07-03 18:23:33 -0400 |
| commit | f26808ba7227a921e0e8549c7d3c52332b920085 (patch) | |
| tree | 699f09c2967d89edbcdc522102019240a90c3c0d /kernel | |
| parent | f90658725ba7ebb031054866aff4cda0d099a3b1 (diff) | |
| download | linux-stable-f26808ba7227a921e0e8549c7d3c52332b920085.tar.gz linux-stable-f26808ba7227a921e0e8549c7d3c52332b920085.tar.bz2 linux-stable-f26808ba7227a921e0e8549c7d3c52332b920085.zip | |
tracing: Optimize trace_buffer_iter() logic
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>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.h | 4 |
1 files changed, 1 insertions, 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); |