Remove mark_ttys function and fix tty_display_info initialization.

* lisp.h (mark_ttys): Remove prototype.
* alloc.c (Fgarbage_collect): Remove redundant (and the only) call
to mark_ttys because all possible values of 'top_frame' slot are
the frames which are reachable from Vframe_list.
* term.c (mark_ttys): Remove.
(init_tty): Safely initialize 'top_frame' slot with Qnil.

4 files changed, 11 insertions, 18 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 00ce2e46f04..4db48bbb969 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,15 @@
 2012-08-31  Dmitry Antipov  <dmantipov@yandex.ru>
 
+        Remove mark_ttys function and fix tty_display_info initialization.
+        * lisp.h (mark_ttys): Remove prototype.
+        * alloc.c (Fgarbage_collect): Remove redundant (and the only) call
+        to mark_ttys because all possible values of 'top_frame' slot are
+        the frames which are reachable from Vframe_list.
+        * term.c (mark_ttys): Remove.
+        (init_tty): Safely initialize 'top_frame' slot with Qnil.
+
+2012-08-31  Dmitry Antipov  <dmantipov@yandex.ru>
+
         Change struct frame bitfields from unsigned char to unsigned.
         * frame.h (struct frame): Change type of 'display_preempted',
         'visible', 'iconified', 'has_minibuffer', 'wants_modeline',
diff --git a/src/alloc.c b/src/alloc.c
index 36ba22cc535..e8637471bc7 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -5476,7 +5476,6 @@ See Info node `(elisp)Garbage Collection'.  */)
     }
   mark_terminals ();
   mark_kboards ();
-  mark_ttys ();
 
 #ifdef USE_GTK
   {
diff --git a/src/lisp.h b/src/lisp.h
index 49a2832d686..80c49703f52 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3438,7 +3438,6 @@ extern Lisp_Object directory_files_internal (Lisp_Object, Lisp_Object,
 
 /* Defined in term.c */
 extern int *char_ins_del_vector;
-extern void mark_ttys (void);
 extern void syms_of_term (void);
 extern _Noreturn void fatal (const char *msgid, ...)
   ATTRIBUTE_FORMAT_PRINTF (1, 2);
diff --git a/src/term.c b/src/term.c
index 23e074287c1..f1a09b39cf9 100644
--- a/src/term.c
+++ b/src/term.c
@@ -3001,6 +3001,7 @@ init_tty (const char *name, const char *terminal_type, int must_succeed)
 #else
   tty = xzalloc (sizeof *tty);
 #endif
+  tty->top_frame = Qnil;
   tty->next = tty_list;
   tty_list = tty;
 
@@ -3541,22 +3542,6 @@ delete_tty (struct terminal *terminal)
   xfree (tty);
 }
 
-
-
-/* Mark the pointers in the tty_display_info objects.
-   Called by Fgarbage_collect.  */
-
-void
-mark_ttys (void)
-{
-  struct tty_display_info *tty;
-
-  for (tty = tty_list; tty; tty = tty->next)
-    mark_object (tty->top_frame);
-}
-
-
-
 void
 syms_of_term (void)
 {