r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000001080)='/proc/mdstat\x00', 0x0, 0x0)
r1 = epoll_create(0x1ff)
epoll_ctl$EPOLL_CTL_ADD(r1, 0x1, r0, &(0x7f00000000c0))