this_cpu_xchg_4   401 arch/x86/include/asm/percpu.h #define this_cpu_xchg_4(pcp, nval)	percpu_xchg_op(pcp, nval)
this_cpu_xchg_4   380 include/asm-generic/percpu.h #define this_cpu_xchg_4(pcp, nval)	this_cpu_generic_xchg(pcp, nval)