r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/bus/input/devices\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000140)=[{&(0x7f0000000040)=""/241, 0xf1}], 0x1, 0x0, 0x0)