r0 = openat$procfs(0xffffffffffffff9c, &(0x7f00000006c0)='/proc/mdstat\x00', 0x0, 0x0)
mmap$IORING_OFF_CQ_RING(&(0x7f0000ff3000/0xd000)=nil, 0xd000, 0x300000a, 0x12, r0, 0x8000000)