Structs starting with `u' in bsd/vfs

• umask_args bsd/vfs/vfs_syscalls.c:2617
• undelete_args bsd/vfs/vfs_syscalls.c:1129
• unlink_args bsd/vfs/vfs_syscalls.c:1169
• unmount_args bsd/vfs/vfs_syscalls.c:360
• utimes_args bsd/vfs/vfs_syscalls.c:1862