Subject: Re: bug#12450: Remove configure's --without-sync-input option.

From: Eli Zaretskii <[email-masked]>
Date: Sat, 22 Sep 2012 12:50:34 +0300

> Date: Sat, 22 Sep 2012 02:34:58 -0700
> From: Paul Eggert <[email-masked]>
> CC: [email-masked]
> 
> When they use the word "asynchronously", I assume
> they're talking about from the Lisp point of view,
> not the Unix signal-handler point of view.

The comments in redisplay code don't talk about Lisp.  There's no Lisp
running when redisplay happens, except through safe_eval.  These
comments talk about asynchronous entry to redisplay mentioned in the
large commentary near the beginning of xdisp.c.  AFAIU, this
asynchronous entry is no longer possible.