HelenOS sources

sys_physmem_unmap   72 kernel/generic/include/ddi/ddi.h extern sys_errno_t sys_physmem_unmap(uintptr_t);
sys_physmem_unmap  115 kernel/generic/src/syscall/syscall.c 	[SYS_PHYSMEM_UNMAP] = (syshandler_t) sys_physmem_unmap,