* src/xdisp.c (syms_of_xdisp): New vars redisplay--all-windows-cause and

redisplay--mode-lines-cause.
(redisplay_internal): Keep them uptodate.  Remove redundant check of
buffer_shared_and_changed.
* *.[chm]: Number every assignment to update_mode_lines so we
can track why it is set.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/process.c b/src/process.c
index c0c522a1403..307eab3ab30 100644
--- a/src/process.c
+++ b/src/process.c
@@ -5246,7 +5246,7 @@ DEFUN ("internal-default-process-filter", Finternal_default_process_filter,
       else
         set_marker_both (p->mark, p->buffer, PT, PT_BYTE);
 
-      update_mode_lines++;
+      update_mode_lines = 23;
 
       /* Make sure opoint and the old restrictions
          float ahead of any new text just as point would.  */
@@ -6390,7 +6390,7 @@ status_notify (struct Lisp_Process *deleting_process)
         }
     } /* end for */
 
-  update_mode_lines++;  /* In case buffers use %s in mode-line-format.  */
+  update_mode_lines = 24;  /* In case buffers use %s in mode-line-format.  */
   UNGCPRO;
 }