bug#64596: 30.0.50; On FIXME: in src/buffer.c:1481 (force-mode-line-update)

[Ihor Radchenko <yantar92@posteo.net>]

Eli Zaretskii <eliz@gnu.org> writes:

>> > Actually, the must_be_updated_p flag is not for xdisp.c, i.e. not for
>> > redisplay_window and its subroutines.  It is for update_window, which
>> > is the last, 3rd, stage of a redisplay cycle, most of the code of
>> > which is in dispnew.c...
>> 
>> I have to say that these flag names are very disorienting.
>> I have first seen this flag while reading xdisp.c, and it was not obvious
>> at all what it does.
>
> Well, update_frame and update_window are the relevant functions in
> dispnew.c, so "must_be_updated_p" kind-of points to them.

This does not help the confusion, unfortunately.
Or maybe the terms "redisplay" and "update" should be explained better
somewhere near the top of xdisp.c. They clearly have different meaning,
but not for untrained eye.

-- 
Ihor Radchenko // yantar92,
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