git: openjdk/jdk: 8316337: (bf) Concurrency issue in DirectByteBuffer.Deallocator

[Per Minborg]

Changeset: cf74b8c2
Author:    Per Minborg <pminborg at openjdk.org>
Date:      2023-09-19 13:10:51 +0000
URL:       https://git.openjdk.org/jdk/commit/cf74b8c2a32f33019a13ce80b6667da502cc6722

8316337: (bf) Concurrency issue in DirectByteBuffer.Deallocator

Reviewed-by: alanb, liach

! src/java.base/share/classes/java/nio/Direct-X-Buffer.java.template
! src/java.base/share/classes/java/nio/MappedByteBuffer.java
! src/java.base/share/classes/sun/nio/ch/FileChannelImpl.java