Commit 3821fd35 ("jump_label: Reduce the size of struct static_key")
broke old compilers that could not handle static initialization of anonymous
unions. Boris fixed it with a patch that added brackets around the static
initializer. But this creates a dependency between those initializers and
the structure's order of its fields. Document this dependency in case new
fields are added to struct static_key in the future.
Noted-by: NBoris Ostrovsky <boris.ostrovsky@oracle.com>
Suggested-by: NChris Mason <clm@fb.com>
Signed-off-by: NSteven Rostedt (VMware) <rostedt@goodmis.org>