JDK-8231612 added Atomic::CmpxchgByteUsingInt::set_byte_in_int, and SonarCloud instance reports a problem there: "Add an explicit cast to the result of the "<<" operator."

inline uint32_t Atomic::CmpxchgByteUsingInt::set_byte_in_int(uint32_t n,
                                                             uint8_t b,
                                                             uint32_t idx) {
  int bitsIdx = BitsPerByte * idx;
  return (n & ~(0xff << bitsIdx)) | (b << bitsIdx); // <--- at "b << bitsIdx"
}

I think when "b << bitsIdx" is done, "b" is promoted to int first. Probably casting to uint32_t first is safer.