r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000180)='/proc/zoneinfo\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000340)=[{&(0x7f00000001c0)=""/213, 0xd5}], 0x1, 0x9, 0x0)