r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/bus/input/devices\x00', 0x0, 0x0)
readv(r0, &(0x7f0000001780)=[{&(0x7f00000006c0)=""/4096, 0x1000}], 0x1)