linux-kernel - Re: [PATCH 2/6] treewide: remove using list iterator after loop body as a ptr

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Message-ID: <CAHk-=whKqg89zu4T95+ctY-hocR6kDArpo2qO14-kV40Ga7ufw@mail.gmail.com>
Date:   Tue, 1 Mar 2022 15:03:19 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     David Laight <David.Laight@...lab.com>
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Subject: Re: [PATCH 2/6] treewide: remove using list iterator after loop body
 as a ptr

On Tue, Mar 1, 2022 at 2:58 PM David Laight <David.Laight@...lab.com> wrote:
>
> Can it be resolved by making:
> #define list_entry_is_head(pos, head, member) ((pos) == NULL)
> and double-checking that it isn't used anywhere else (except in
> the list macros themselves).

Well, yes, except for the fact that then the name is entirely misleading...

And somebody possibly uses it together with list_first_entry() etc, so
it really is completely broken to mix that change with the list
traversal change.

             Linus

               Linus