r0 = openat$sysfs(0xffffffffffffff9c, &(0x7f0000000480)='/sys/power/reserved_size', 0x1, 0x0)
pwritev2(r0, &(0x7f0000000640)=[{&(0x7f0000000580)='O', 0x1}], 0x1, 0x0, 0x0, 0x0)