CONFIG_TRACING (not configurable)

modulename: trace.ko

and/or

tracefs.ko

and/or

trace_output.ko

and/or

trace_seq.ko

and/or

trace_stat.ko

and/or

trace_printk.ko

and/or

pid_list.ko

and/or

tracepoint.ko

and/or

trace_clock.ko

configname: CONFIG_TRACING

Linux Kernel Configuration
└─>Kernel hacking
└─>TRACING
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
source code:
drivers/base//trace.c

is selected by
CONFIG_BOOTTIME_TRACING