this_cpu_xchg     513 include/linux/percpu-defs.h #define this_cpu_xchg(pcp, nval)	__pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
this_cpu_xchg       8 tools/testing/radix-tree/linux/percpu.h #define this_cpu_xchg(var, val)		uatomic_xchg(&var, val)