Description copied from the original bug:
JDK21 has a copyright issue with following files, where GPLv2 is present but Classpath exception is missing,

Please, if someone can help to fix these issues.

src/java.base/share/classes/jdk/internal/classfile/components/ClassRemapper.java
src/java.base/share/classes/jdk/internal/classfile/components/CodeLocalsShifter.java
src/java.base/share/classes/jdk/internal/classfile/components/CodeRelabeler.java
src/java.base/share/classes/jdk/internal/classfile/components/CodeStackTracker.java
src/java.base/share/classes/jdk/internal/classfile/impl/ClassHierarchyImpl.java
src/java.base/share/classes/jdk/internal/classfile/impl/ClassRemapperImpl.java
src/java.base/share/classes/jdk/internal/classfile/impl/CodeLocalsShifterImpl.java
src/java.base/share/classes/jdk/internal/classfile/impl/CodeRelabelerImpl.java
src/java.base/share/classes/jdk/internal/classfile/impl/CodeStackTrackerImpl.java
src/java.base/share/classes/jdk/internal/classfile/impl/StackCounter.java
src/java.base/share/classes/jdk/internal/classfile/impl/StackMapGenerator.java
src/java.base/share/classes/jdk/internal/classfile/impl/verifier/VerificationWrapper.java
src/java.base/share/classes/jdk/internal/foreign/abi/riscv64/RISCV64Architecture.java
src/java.base/share/classes/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64CallArranger.java
src/java.base/share/classes/jdk/internal/foreign/abi/riscv64/linux/LinuxRISCV64Linker.java
src/java.base/share/classes/jdk/internal/foreign/abi/riscv64/linux/TypeClass.java
src/java.base/share/classes/jdk/internal/util/Architecture.java
src/java.base/share/classes/jdk/internal/util/OSVersion.java
src/java.base/share/classes/jdk/internal/util/OperatingSystem.java
src/java.base/share/classes/jdk/internal/util/PlatformProps.java

Mail: https://mail.openjdk.org/pipermail/jdk-dev/2023-July/008040.html