r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./cgroup/pids.max\x00', 0x2, 0x0)
write$P9_RREADLINK(r0, &(0x7f0000000040)={0x2b, 0x17, 0x0, {0x7, './file0'}}, 0x10)