r0 = openat$rtc(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
preadv(r0, &(0x7f0000001480)=[{0x0}, {&(0x7f0000000200)=""/160, 0xa0}], 0x2, 0x0, 0x0)
ioctl$BTRFS_IOC_SUBVOL_SETFLAGS(0xffffffffffffffff, 0x4008941a, 0x0)
pread64(0xffffffffffffffff, 0x0, 0x0, 0x0)
ioctl(0xffffffffffffffff, 0x0, 0x0)