r0 = openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup/cgroup.procs\x00', 0x0, 0x0)
r1 = timerfd_create(0x0, 0x0)
mount$9p_fd(0x0, &(0x7f0000000080)='./cgroup/cgroup.procs\x00', &(0x7f0000000100), 0x0, &(0x7f00000002c0)={'trans=fd,', {'rfdno', 0x3d, r0}, 0x2c, {'wfdno', 0x3d, r1}})