diff --git a/gdb/guile/scm-arch.c b/gdb/guile/scm-arch.c
index 6a805c6..e4f85bf 100644
--- a/gdb/guile/scm-arch.c
+++ b/gdb/guile/scm-arch.c
@@ -45,14 +45,6 @@ static int arscm_is_arch (SCM);
 
 /* Administrivia for arch smobs.  */
 
-/* The smob "mark" function for <gdb:arch>.  */
-
-static SCM
-arscm_mark_arch_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "print" function for <gdb:arch>.  */
 
 static int
@@ -651,7 +643,6 @@ void
 gdbscm_initialize_arches (void)
 {
   arch_smob_tag = gdbscm_make_smob_type (arch_smob_name, sizeof (arch_smob));
-  scm_set_smob_mark (arch_smob_tag, arscm_mark_arch_smob);
   scm_set_smob_print (arch_smob_tag, arscm_print_arch_smob);
 
   gdbscm_define_functions (arch_functions, 1);
diff --git a/gdb/guile/scm-block.c b/gdb/guile/scm-block.c
index 8f39e7c..a8a949f 100644
--- a/gdb/guile/scm-block.c
+++ b/gdb/guile/scm-block.c
@@ -117,14 +117,6 @@ bkscm_objfile_block_map (struct objfile *objfile)
   return htab;
 }
 
-/* The smob "mark" function for <gdb:block>.  */
-
-static SCM
-bkscm_mark_block_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:block>.  */
 
 static size_t
@@ -529,14 +521,6 @@ gdbscm_block_symbols (SCM self)
 /* The <gdb:block-symbols-iterator> object,
    for iterating over all symbols in a block.  */
 
-/* The smob "mark" function for <gdb:block-symbols-iterator>.  */
-
-static SCM
-bkscm_mark_block_syms_progress_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "print" function for <gdb:block-symbols-iterator>.  */
 
 static int
@@ -787,15 +771,12 @@ gdbscm_initialize_blocks (void)
 {
   block_smob_tag
     = gdbscm_make_smob_type (block_smob_name, sizeof (block_smob));
-  scm_set_smob_mark (block_smob_tag, bkscm_mark_block_smob);
   scm_set_smob_free (block_smob_tag, bkscm_free_block_smob);
   scm_set_smob_print (block_smob_tag, bkscm_print_block_smob);
 
   block_syms_progress_smob_tag
     = gdbscm_make_smob_type (block_syms_progress_smob_name,
 			     sizeof (block_syms_progress_smob));
-  scm_set_smob_mark (block_syms_progress_smob_tag,
-		     bkscm_mark_block_syms_progress_smob);
   scm_set_smob_print (block_syms_progress_smob_tag,
 		      bkscm_print_block_syms_progress_smob);
 
diff --git a/gdb/guile/scm-frame.c b/gdb/guile/scm-frame.c
index ee30597..8800923 100644
--- a/gdb/guile/scm-frame.c
+++ b/gdb/guile/scm-frame.c
@@ -130,14 +130,6 @@ frscm_inferior_frame_map (struct inferior *inferior)
   return htab;
 }
 
-/* The smob "mark" function for <gdb:frame>.  */
-
-static SCM
-frscm_mark_frame_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:frame>.  */
 
 static size_t
@@ -1058,7 +1050,6 @@ gdbscm_initialize_frames (void)
 {
   frame_smob_tag
     = gdbscm_make_smob_type (frame_smob_name, sizeof (frame_smob));
-  scm_set_smob_mark (frame_smob_tag, frscm_mark_frame_smob);
   scm_set_smob_free (frame_smob_tag, frscm_free_frame_smob);
   scm_set_smob_print (frame_smob_tag, frscm_print_frame_smob);
 
diff --git a/gdb/guile/scm-lazy-string.c b/gdb/guile/scm-lazy-string.c
index 9409379..0ba09f0 100644
--- a/gdb/guile/scm-lazy-string.c
+++ b/gdb/guile/scm-lazy-string.c
@@ -60,14 +60,6 @@ static scm_t_bits lazy_string_smob_tag;
 
 /* Administrivia for lazy string smobs.  */
 
-/* The smob "mark" function for <gdb:lazy-string>.  */
-
-static SCM
-lsscm_mark_lazy_string_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:lazy-string>.  */
 
 static size_t
@@ -358,7 +350,6 @@ gdbscm_initialize_lazy_strings (void)
 {
   lazy_string_smob_tag = gdbscm_make_smob_type (lazy_string_smob_name,
 						sizeof (lazy_string_smob));
-  scm_set_smob_mark (lazy_string_smob_tag, lsscm_mark_lazy_string_smob);
   scm_set_smob_free (lazy_string_smob_tag, lsscm_free_lazy_string_smob);
   scm_set_smob_print (lazy_string_smob_tag, lsscm_print_lazy_string_smob);
 
diff --git a/gdb/guile/scm-symbol.c b/gdb/guile/scm-symbol.c
index b6a92a4..cdc92ef 100644
--- a/gdb/guile/scm-symbol.c
+++ b/gdb/guile/scm-symbol.c
@@ -95,14 +95,6 @@ syscm_objfile_symbol_map (struct symbol *symbol)
   return htab;
 }
 
-/* The smob "mark" function for <gdb:symbol>.  */
-
-static SCM
-syscm_mark_symbol_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:symbol>.  */
 
 static size_t
@@ -756,7 +748,6 @@ gdbscm_initialize_symbols (void)
 {
   symbol_smob_tag
     = gdbscm_make_smob_type (symbol_smob_name, sizeof (symbol_smob));
-  scm_set_smob_mark (symbol_smob_tag, syscm_mark_symbol_smob);
   scm_set_smob_free (symbol_smob_tag, syscm_free_symbol_smob);
   scm_set_smob_print (symbol_smob_tag, syscm_print_symbol_smob);
 
diff --git a/gdb/guile/scm-symtab.c b/gdb/guile/scm-symtab.c
index 9c7f51c..2d09da3 100644
--- a/gdb/guile/scm-symtab.c
+++ b/gdb/guile/scm-symtab.c
@@ -119,14 +119,6 @@ stscm_objfile_symtab_map (struct symtab *symtab)
   return htab;
 }
 
-/* The smob "mark" function for <gdb:symtab>.  */
-
-static SCM
-stscm_mark_symtab_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:symtab>.  */
 
 static size_t
@@ -706,7 +698,6 @@ gdbscm_initialize_symtabs (void)
 {
   symtab_smob_tag
     = gdbscm_make_smob_type (symtab_smob_name, sizeof (symtab_smob));
-  scm_set_smob_mark (symtab_smob_tag, stscm_mark_symtab_smob);
   scm_set_smob_free (symtab_smob_tag, stscm_free_symtab_smob);
   scm_set_smob_print (symtab_smob_tag, stscm_print_symtab_smob);
 
diff --git a/gdb/guile/scm-type.c b/gdb/guile/scm-type.c
index b65c06a..4e09cbc 100644
--- a/gdb/guile/scm-type.c
+++ b/gdb/guile/scm-type.c
@@ -178,14 +178,6 @@ tyscm_type_map (struct type *type)
   return htab;
 }
 
-/* The smob "mark" function for <gdb:type>.  */
-
-static SCM
-tyscm_mark_type_smob (SCM self)
-{
-  return SCM_BOOL_F;
-}
-
 /* The smob "free" function for <gdb:type>.  */
 
 static size_t
@@ -1471,7 +1463,6 @@ void
 gdbscm_initialize_types (void)
 {
   type_smob_tag = gdbscm_make_smob_type (type_smob_name, sizeof (type_smob));
-  scm_set_smob_mark (type_smob_tag, tyscm_mark_type_smob);
   scm_set_smob_free (type_smob_tag, tyscm_free_type_smob);
   scm_set_smob_print (type_smob_tag, tyscm_print_type_smob);
   scm_set_smob_equalp (type_smob_tag, tyscm_equal_p_type_smob);
