compat_20_sys_statfs
int compat_20_sys_statfs(struct lwp *, const struct compat_20_sys_statfs_args *, register_t *);
.sy_call = (sy_call_t *)compat_20_sys_statfs
{ SYS_compat_20_statfs, 0, (sy_call_t *)compat_20_sys_statfs },
int compat_20_sys_statfs(struct lwp *, const struct compat_20_sys_statfs_args *, register_t *);
.sy_call = (sy_call_t *)compat_20_sys_statfs
int compat_20_sys_statfs(struct lwp *, const struct compat_20_sys_statfs_args *, register_t *);
check_syscall_args(compat_20_sys_statfs)