Re: [PATCH] drivers/block/ub.c: use list_for_each_entry()

[Roland Dreier <rdreier@cisco.com>]

 > The negative is the sheer number of helper functions in list.h. Personally,
 > I find it difficult to retain a working knowledge of them. Iterators are
 > particularly nasty that way. I'm thinking about dropping all of these
 > list_for_each_with_murky_argument_requirements_and_odd_side_effects()
 > and use plain for(;;), as a courtesy to someone who has to read the
 > code years down the road.

I think I disagree with this reasoning.  If I'm reading your code and
I see, say, list_for_each_entry_safe(), I can be pretty confident that
your loop works correctly.  If you write your own for loop, then I
have to check that you actually got the linked list walking right.

 - R.