]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
tracing: Optimize trace_buffer_iter() logic
authoryuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
Sun, 8 Apr 2018 11:36:31 +0000 (19:36 +0800)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Tue, 3 Jul 2018 22:23:33 +0000 (18:23 -0400)
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

index 630c5a24b2b255bf7cd35ef1524e25508835679f..f8f86231ad90e48b73b7eb2dc8d1def48071219a 100644 (file)
@@ -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);