A few comments on new Section 9.5.1.2 "Core RCU API"

[Akira Yokosawa <akiyks@xxxxxxxxx>]

Hi Paul,

Here are a few comments occurred to me while reading Section
9.5.1.2.

o Section title reads "Core RCU API", whereas Table 9.1's
  caption reads "RCU Core API".  They look somewhat
  inconsistent.  Is the difference intentional?

o In the introduction of rcu_dereference(), the term of
  "an RCU-protected pointer" is used first time throughout
  this book.  It is also used in the new Table 9.1.

  I think it is pretty obvious for you what it means, but a
  first-time reader might wonder, "What does protecting a
  pointer mean?"

  A short answer would be something like:

    What is protected by an RCU read-side critical section is
    not the pointer itself, but an instance of a pointed-to
    data structure on memory.

  You can expand as you'd like.

Thoughts?

        Thanks, Akira