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

[Ihor Radchenko]

Eli Zaretskii <eliz@gnu.org> writes:

> The actual issue with the above is different: it implies that
> update_mode_lines _always_ indicates that more than a single mode line
> should be updated (which is why we need to "consider all windows").
> But is that actually true, i.e. does every place that assigns non-zero
> to update_mode_lines indeed perform a change which makes it
> _necessary_ to consider non-selected windows?

At least, when the current buffer is only displayed in a single,
selected window, checking every window should not be necessary.

Compare bset_redisplay and bset_update_mode_line.

-- 
Ihor Radchenko // yantar92,
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