r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f00000000c0)='/sys/class/wakeup', 0x0, 0x0)
vmsplice(r0, &(0x7f0000000440)=[{&(0x7f0000000140)='\a', 0x1}], 0x1, 0x0)