+
+----------------------------
+
+What: usedac i386 kernel parameter
+When: 2.6.27
+Why: replaced by allowdac and no dac combination
+Who: Glauber Costa <gcosta@redhat.com>
+
+---------------------------
+
+What: /sys/o2cb symlink
+When: January 2010
+Why: /sys/fs/o2cb is the proper location for this information - /sys/o2cb
+ exists as a symlink for backwards compatibility for old versions of
+ ocfs2-tools. 2 years should be sufficient time to phase in new versions
+ which know to look in /sys/fs/o2cb.
+Who: ocfs2-devel@oss.oracle.com
+
+---------------------------
+
+What: asm/semaphore.h
+When: 2.6.26
+Why: Implementation became generic; users should now include
+ linux/semaphore.h instead.
+Who: Matthew Wilcox <willy@linux.intel.com>