r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/rcu_expedited', 0x0, 0x0)
preadv(r0, &(0x7f0000000140)=[{&(0x7f0000000280)=""/4096, 0x1000}], 0x1, 0x0, 0x0)