<def f='src/src/sys/arch/xen/include/xen.h' l='202' ll='218' type='u_long xen_atomic_xchg(volatile u_long * ptr, unsigned long val)'/>
<use f='src/src/sys/arch/xen/x86/hypervisor_machdep.c' l='106' u='c' c='evt_iterate_bits'/>
