CONFIG_TRACING_BRANCHES (not configurable)

configname: CONFIG_TRACING_BRANCHES

Linux Kernel Configuration
└─>Kernel hacking
└─>Tracers
└─>TRACING_BRANCHES
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Selected by tracers that will trace the likely and unlikely
conditions. This prevents the tracers themselves from being
profiled. Profiling the tracing infrastructure can only happen
when the likelys and unlikelys are not being traced.