TRACE_FTRACE_START  614 kernel/trace/trace.h #define TRACE_FTRACE_MAX	((1 << (TRACE_FTRACE_START + TRACE_CONTEXT_BITS)) - 1)
TRACE_FTRACE_START  141 kernel/trace/trace_functions.c 	bit = trace_test_and_set_recursion(TRACE_FTRACE_START, TRACE_FTRACE_MAX);