diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1781ddd..a906d50 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,24 @@
+2017-09-10  Tom Tromey  <tom@tromey.com>
+
+	* common/common-utils.h (skip_to_space): Remove macro, redeclare
+	as function.
+	(skip_to_space): Rename from skip_to_space_const.
+	* common/common-utils.c (skip_to_space): New function.
+	(skip_to_space): Rename from skip_to_space_const.
+	* cli/cli-utils.h (get_number): Rename from get_number_const.
+	(extract_arg): Rename from extract_arg_const.
+	* cli/cli-utils.c (get_number): Rename from get_number_const.
+	(extract_arg): Rename from extract_arg_const.
+	(number_or_range_parser::get_number): Use ::get_number.
+	* aarch64-linux-tdep.c, ada-lang.c, arm-linux-tdep.c, ax-gdb.c,
+	break-catch-throw.c, breakpoint.c, cli/cli-cmds.c, cli/cli-dump.c,
+	cli/cli-script.c, cli/cli-setshow.c, compile/compile.c,
+	completer.c, demangle.c, disasm.c, findcmd.c, linespec.c,
+	linux-tdep.c, linux-thread-db.c, location.c, mi/mi-parse.c,
+	minsyms.c, nat/linux-procfs.c, printcmd.c, probe.c,
+	python/py-breakpoint.c, record.c, rust-exp.y, serial.c, stack.c,
+	stap-probe.c, tid-parse.c, tracepoint.c: Update all callers.
+
 2017-09-10  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* utils.c (abort_with_message): Don't compare gdb_stderr to NULL,
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 4381359..b6052ba 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -305,7 +305,7 @@ aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
 	       regname, p->saved_arg);
 
       ++tmp;
-      tmp = skip_spaces_const (tmp);
+      tmp = skip_spaces (tmp);
       /* Now we expect a number.  It can begin with '#' or simply
 	 a digit.  */
       if (*tmp == '#')
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index fdc2a90..bfd67bc 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -12732,13 +12732,13 @@ ada_get_next_arg (const char **argsp)
   const char *end;
   char *result;
 
-  args = skip_spaces_const (args);
+  args = skip_spaces (args);
   if (args[0] == '\0')
     return NULL; /* No more arguments.  */
   
   /* Find the end of the current argument.  */
 
-  end = skip_to_space_const (args);
+  end = skip_to_space (args);
 
   /* Adjust ARGSP to point to the start of the next argument.  */
 
@@ -12785,12 +12785,12 @@ catch_ada_exception_command_split (const char *args,
 
   /* Check to see if we have a condition.  */
 
-  args = skip_spaces_const (args);
+  args = skip_spaces (args);
   if (startswith (args, "if")
       && (isspace (args[2]) || args[2] == '\0'))
     {
       args += 2;
-      args = skip_spaces_const (args);
+      args = skip_spaces (args);
 
       if (args[0] == '\0')
         error (_("Condition missing after `if' keyword"));
@@ -13044,14 +13044,14 @@ catch_ada_exception_command (char *arg_entry, int from_tty,
 static void
 catch_ada_assert_command_split (const char *args, char **cond_string)
 {
-  args = skip_spaces_const (args);
+  args = skip_spaces (args);
 
   /* Check whether a condition was provided.  */
   if (startswith (args, "if")
       && (isspace (args[2]) || args[2] == '\0'))
     {
       args += 2;
-      args = skip_spaces_const (args);
+      args = skip_spaces (args);
       if (args[0] == '\0')
         error (_("condition missing after `if' keyword"));
       *cond_string = xstrdup (args);
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index f3ca8f7..72b91d4 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -1211,7 +1211,7 @@ arm_stap_parse_special_token (struct gdbarch *gdbarch,
 	       regname, p->saved_arg);
 
       ++tmp;
-      tmp = skip_spaces_const (tmp);
+      tmp = skip_spaces (tmp);
       if (*tmp == '#' || *tmp == '$')
 	++tmp;
 
diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index c888e8c..227590b 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -2702,7 +2702,7 @@ maint_agent_printf_command (char *exp, int from_tty)
 
   cmdrest = exp;
 
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   if (*cmdrest++ != '"')
     error (_("Must start with a format string."));
@@ -2718,14 +2718,14 @@ maint_agent_printf_command (char *exp, int from_tty)
   if (*cmdrest++ != '"')
     error (_("Bad format string, non-terminated '\"'."));
   
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   if (*cmdrest != ',' && *cmdrest != 0)
     error (_("Invalid argument syntax"));
 
   if (*cmdrest == ',')
     cmdrest++;
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   nargs = 0;
   while (*cmdrest != '\0')
diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c
index c8612db..faa878e 100644
--- a/gdb/break-catch-throw.c
+++ b/gdb/break-catch-throw.c
@@ -402,7 +402,7 @@ extract_exception_regexp (const char **string)
   const char *start;
   const char *last, *last_space;
 
-  start = skip_spaces_const (*string);
+  start = skip_spaces (*string);
 
   last = start;
   last_space = start;
@@ -416,7 +416,7 @@ extract_exception_regexp (const char **string)
 
       /* No "if" token here.  Skip to the next word start.  */
       last_space = skip_to_space (last);
-      last = skip_spaces_const (last_space);
+      last = skip_spaces (last_space);
     }
 
   *string = last;
@@ -438,7 +438,7 @@ catch_exception_command_1 (enum exception_event_kind ex_event,
 
   if (!arg)
     arg = "";
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   std::string except_rx = extract_exception_regexp (&arg);
 
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 123420c..b642bc6 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -1048,8 +1048,8 @@ condition_completer (struct cmd_list_element *cmd,
 {
   const char *space;
 
-  text = skip_spaces_const (text);
-  space = skip_to_space_const (text);
+  text = skip_spaces (text);
+  space = skip_to_space (text);
   if (*space == '\0')
     {
       int len;
@@ -1084,7 +1084,7 @@ condition_completer (struct cmd_list_element *cmd,
     }
 
   /* We're completing the expression part.  */
-  text = skip_spaces_const (space);
+  text = skip_spaces (space);
   expression_completer (cmd, tracker, text, word);
 }
 
@@ -2431,7 +2431,7 @@ parse_cmd_to_aexpr (CORE_ADDR scope, char *cmd)
 
   if (*cmdrest == ',')
     ++cmdrest;
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   if (*cmdrest++ != '"')
     error (_("No format string following the location"));
@@ -2447,14 +2447,14 @@ parse_cmd_to_aexpr (CORE_ADDR scope, char *cmd)
   if (*cmdrest++ != '"')
     error (_("Bad format string, non-terminated '\"'."));
   
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   if (!(*cmdrest == ',' || *cmdrest == '\0'))
     error (_("Invalid argument syntax"));
 
   if (*cmdrest == ',')
     cmdrest++;
-  cmdrest = skip_spaces_const (cmdrest);
+  cmdrest = skip_spaces (cmdrest);
 
   /* For each argument, make an expression.  */
 
@@ -8460,7 +8460,7 @@ add_solib_catchpoint (const char *arg, int is_load, int is_temp, int enabled)
 
   if (!arg)
     arg = "";
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   std::unique_ptr<solib_catchpoint> c (new solib_catchpoint ());
 
@@ -9204,9 +9204,9 @@ init_breakpoint_sal (struct breakpoint *b, struct gdbarch *gdbarch,
 		  const char *endp;
 		  char *marker_str;
 
-		  p = skip_spaces_const (p);
+		  p = skip_spaces (p);
 
-		  endp = skip_to_space_const (p);
+		  endp = skip_to_space (p);
 
 		  marker_str = savestring (p, endp - p);
 		  t->static_trace_marker_id = marker_str;
@@ -9504,7 +9504,7 @@ find_condition_and_thread (const char *tok, CORE_ADDR pc,
       const char *cond_start = NULL;
       const char *cond_end = NULL;
 
-      tok = skip_spaces_const (tok);
+      tok = skip_spaces (tok);
 
       if ((*tok == '"' || *tok == ',') && rest)
 	{
@@ -9512,7 +9512,7 @@ find_condition_and_thread (const char *tok, CORE_ADDR pc,
 	  return;
 	}
 
-      end_tok = skip_to_space_const (tok);
+      end_tok = skip_to_space (tok);
 
       toklen = end_tok - tok;
 
@@ -9569,9 +9569,9 @@ decode_static_tracepoint_spec (const char **arg_p)
   char *marker_str;
   int i;
 
-  p = skip_spaces_const (p);
+  p = skip_spaces (p);
 
-  endp = skip_to_space_const (p);
+  endp = skip_to_space (p);
 
   marker_str = savestring (p, endp - p);
   old_chain = make_cleanup (xfree, marker_str);
@@ -11064,8 +11064,8 @@ watch_command_1 (const char *arg, int accessflag, int from_tty,
   else if (val != NULL)
     release_value (val);
 
-  tok = skip_spaces_const (arg);
-  end_tok = skip_to_space_const (tok);
+  tok = skip_spaces (arg);
+  end_tok = skip_to_space (tok);
 
   toklen = end_tok - tok;
   if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
@@ -11583,7 +11583,7 @@ ep_parse_optional_if_clause (const char **arg)
 
   /* Skip any extra leading whitespace, and record the start of the
      condition string.  */
-  *arg = skip_spaces_const (*arg);
+  *arg = skip_spaces (*arg);
   cond_string = *arg;
 
   /* Assume that the condition occupies the remainder of the arg
@@ -11619,7 +11619,7 @@ catch_fork_command_1 (char *arg_entry, int from_tty,
 
   if (!arg)
     arg = "";
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   /* The allowed syntax is:
      catch [v]fork
@@ -11664,7 +11664,7 @@ catch_exec_command_1 (char *arg_entry, int from_tty,
 
   if (!arg)
     arg = "";
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   /* The allowed syntax is:
      catch exec
diff --git a/gdb/cli/cli-cmds.c b/gdb/cli/cli-cmds.c
index a2041fa..883844e 100644
--- a/gdb/cli/cli-cmds.c
+++ b/gdb/cli/cli-cmds.c
@@ -1240,7 +1240,7 @@ disassemble_command (char *arg, int from_tty)
 	    }
 	}
 
-      p = skip_spaces_const (p);
+      p = skip_spaces (p);
     }
 
   if ((flags & (DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_SOURCE))
@@ -1277,7 +1277,7 @@ disassemble_command (char *arg, int from_tty)
       /* Two arguments.  */
       int incl_flag = 0;
       low = pc;
-      p = skip_spaces_const (p);
+      p = skip_spaces (p);
       if (p[0] == '+')
 	{
 	  ++p;
diff --git a/gdb/cli/cli-dump.c b/gdb/cli/cli-dump.c
index 8e59ed4..8d57119 100644
--- a/gdb/cli/cli-dump.c
+++ b/gdb/cli/cli-dump.c
@@ -45,7 +45,7 @@ scan_expression (const char **cmd, const char *def)
 
       end = (*cmd) + strcspn (*cmd, " \t");
       exp = savestring ((*cmd), end - (*cmd));
-      (*cmd) = skip_spaces_const (end);
+      (*cmd) = skip_spaces (end);
       return gdb::unique_xmalloc_ptr<char> (exp);
     }
 }
@@ -71,10 +71,10 @@ scan_filename (const char **cmd, const char *defname)
       /* FIXME: should parse a possibly quoted string.  */
       const char *end;
 
-      (*cmd) = skip_spaces_const (*cmd);
+      (*cmd) = skip_spaces (*cmd);
       end = *cmd + strcspn (*cmd, " \t");
       filename.reset (savestring ((*cmd), end - (*cmd)));
-      (*cmd) = skip_spaces_const (end);
+      (*cmd) = skip_spaces (end);
     }
   gdb_assert (filename != NULL);
 
@@ -538,7 +538,7 @@ restore_command (char *args_in, int from_tty)
 	{
 	  binary_flag = 1;
 	  args += strlen (binary_string);
-	  args = skip_spaces_const (args);
+	  args = skip_spaces (args);
 	}
       /* Parse offset (optional).  */
       if (args != NULL && *args != '\0')
diff --git a/gdb/cli/cli-script.c b/gdb/cli/cli-script.c
index 9b2ffd0..02f66cc 100644
--- a/gdb/cli/cli-script.c
+++ b/gdb/cli/cli-script.c
@@ -888,7 +888,7 @@ line_first_arg (const char *p)
 {
   const char *first_arg = p + find_command_name_length (p);
 
-  return skip_spaces_const (first_arg); 
+  return skip_spaces (first_arg); 
 }
 
 /* Process one input line.  If the command is an "end", return such an
@@ -932,7 +932,7 @@ process_next_line (char *p, struct command_line **command, int parse_commands,
       const char *cmd_name = p;
       struct cmd_list_element *cmd
 	= lookup_cmd_1 (&cmd_name, cmdlist, NULL, 1);
-      cmd_name = skip_spaces_const (cmd_name);
+      cmd_name = skip_spaces (cmd_name);
       bool inline_cmd = *cmd_name != '\0';
 
       /* If commands are parsed, we skip initial spaces.  Otherwise,
diff --git a/gdb/cli/cli-setshow.c b/gdb/cli/cli-setshow.c
index c6e5ebc..f89d268 100644
--- a/gdb/cli/cli-setshow.c
+++ b/gdb/cli/cli-setshow.c
@@ -134,7 +134,7 @@ is_unlimited_literal (const char *arg)
 {
   size_t len = sizeof ("unlimited") - 1;
 
-  arg = skip_spaces_const (arg);
+  arg = skip_spaces (arg);
 
   return (strncmp (arg, "unlimited", len) == 0
 	  && (isspace (arg[len]) || arg[len] == '\0'));
diff --git a/gdb/cli/cli-utils.c b/gdb/cli/cli-utils.c
index 8eac7c4..a00bc52 100644
--- a/gdb/cli/cli-utils.c
+++ b/gdb/cli/cli-utils.c
@@ -93,7 +93,7 @@ get_number_trailer (const char **pp, int trailer)
 	++p;
       retval = 0;
     }
-  p = skip_spaces_const (p);
+  p = skip_spaces (p);
   *pp = p;
   return retval;
 }
@@ -101,7 +101,7 @@ get_number_trailer (const char **pp, int trailer)
 /* See documentation in cli-utils.h.  */
 
 int
-get_number_const (const char **pp)
+get_number (const char **pp)
 {
   return get_number_trailer (pp, '\0');
 }
@@ -172,8 +172,8 @@ number_or_range_parser::get_number ()
 	     and also remember the end of the final token.  */
 
 	  temp = &m_end_ptr;
-	  m_end_ptr = skip_spaces_const (m_cur_tok + 1);
-	  m_end_value = get_number_const (temp);
+	  m_end_ptr = skip_spaces (m_cur_tok + 1);
+	  m_end_value = ::get_number (temp);
 	  if (m_end_value < m_last_retval)
 	    {
 	      error (_("inverted range"));
@@ -250,7 +250,7 @@ remove_trailing_whitespace (const char *start, const char *s)
 /* See documentation in cli-utils.h.  */
 
 char *
-extract_arg_const (const char **arg)
+extract_arg (const char **arg)
 {
   const char *result;
 
@@ -258,13 +258,13 @@ extract_arg_const (const char **arg)
     return NULL;
 
   /* Find the start of the argument.  */
-  *arg = skip_spaces_const (*arg);
+  *arg = skip_spaces (*arg);
   if (!**arg)
     return NULL;
   result = *arg;
 
   /* Find the end of the argument.  */
-  *arg = skip_to_space_const (*arg + 1);
+  *arg = skip_to_space (*arg + 1);
 
   if (result == *arg)
     return NULL;
@@ -280,7 +280,7 @@ extract_arg (char **arg)
   const char *arg_const = *arg;
   char *result;
 
-  result = extract_arg_const (&arg_const);
+  result = extract_arg (&arg_const);
   *arg += arg_const - *arg;
   return result;
 }
diff --git a/gdb/cli/cli-utils.h b/gdb/cli/cli-utils.h
index 9848a27..038ddad 100644
--- a/gdb/cli/cli-utils.h
+++ b/gdb/cli/cli-utils.h
@@ -33,9 +33,9 @@ extern int get_number_trailer (const char **pp, int trailer);
 
 /* Convenience.  Like get_number_trailer, but with no TRAILER.  */
 
-extern int get_number_const (const char **);
+extern int get_number (const char **);
 
-/* Like get_number_const, but takes a non-const "char **".  */
+/* Like get_number, but takes a non-const "char **".  */
 
 extern int get_number (char **);
 
@@ -159,7 +159,7 @@ extern char *extract_arg (char **arg);
    Since the returned value is xmalloc'd, it eventually needs to be
    xfree'ed, which prevents us from making it const as well.  */
 
-extern char *extract_arg_const (const char **arg);
+extern char *extract_arg (const char **arg);
 
 /* A helper function that looks for an argument at the start of a
    string.  The argument must also either be at the end of the string,
diff --git a/gdb/common/common-utils.c b/gdb/common/common-utils.c
index e75a1b9..6b10d11 100644
--- a/gdb/common/common-utils.c
+++ b/gdb/common/common-utils.c
@@ -298,7 +298,7 @@ skip_spaces (char *chp)
 /* A const-correct version of the above.  */
 
 const char *
-skip_spaces_const (const char *chp)
+skip_spaces (const char *chp)
 {
   if (chp == NULL)
     return NULL;
@@ -310,7 +310,7 @@ skip_spaces_const (const char *chp)
 /* See documentation in common-utils.h.  */
 
 const char *
-skip_to_space_const (const char *chp)
+skip_to_space (const char *chp)
 {
   if (chp == NULL)
     return NULL;
@@ -319,6 +319,14 @@ skip_to_space_const (const char *chp)
   return chp;
 }
 
+/* See documentation in common-utils.h.  */
+
+char *
+skip_to_space (char *chp)
+{
+  return (char *) skip_to_space ((const char *) chp);
+}
+
 /* See common/common-utils.h.  */
 
 void
diff --git a/gdb/common/common-utils.h b/gdb/common/common-utils.h
index 787bac9..6475c28 100644
--- a/gdb/common/common-utils.h
+++ b/gdb/common/common-utils.h
@@ -93,16 +93,16 @@ extern char *skip_spaces (char *inp);
 
 /* A const-correct version of the above.  */
 
-extern const char *skip_spaces_const (const char *inp);
+extern const char *skip_spaces (const char *inp);
 
 /* Skip leading non-whitespace characters in INP, returning an updated
    pointer.  If INP is NULL, return NULL.  */
 
-#define skip_to_space(INP) ((char *) skip_to_space_const (INP))
+extern char *skip_to_space (char *inp);
 
 /* A const-correct version of the above.  */
 
-extern const char *skip_to_space_const (const char *inp);
+extern const char *skip_to_space (const char *inp);
 
 /* Assumes that V is an argv for a program, and iterates through
    freeing all the elements.  */
diff --git a/gdb/compile/compile.c b/gdb/compile/compile.c
index fc23d12..4a2f339 100644
--- a/gdb/compile/compile.c
+++ b/gdb/compile/compile.c
@@ -367,7 +367,7 @@ get_selected_pc_producer_options (void)
 
   cs = symtab->producer;
   while (*cs != 0 && *cs != '-')
-    cs = skip_spaces_const (skip_to_space_const (cs));
+    cs = skip_spaces (skip_to_space (cs));
   if (*cs != '-')
     return NULL;
   return cs;
diff --git a/gdb/completer.c b/gdb/completer.c
index 5d81f24..3022333 100644
--- a/gdb/completer.c
+++ b/gdb/completer.c
@@ -699,7 +699,7 @@ collect_explicit_location_matches (completion_tracker &tracker,
 	     keyword.  */
 	  if (keyword != word)
 	    {
-	      keyword = skip_spaces_const (keyword);
+	      keyword = skip_spaces (keyword);
 
 	      tracker.advance_custom_word_point_by (keyword - word);
 	      complete_on_enum (tracker, linespec_keywords, keyword, keyword);
@@ -729,7 +729,7 @@ skip_keyword (completion_tracker &tracker,
 	      const char * const *keywords, const char **text_p)
 {
   const char *text = *text_p;
-  const char *after = skip_to_space_const (text);
+  const char *after = skip_to_space (text);
   size_t len = after - text;
 
   if (text[len] != ' ')
@@ -1903,7 +1903,7 @@ expand_preserving_ws (const char *orig, size_t orig_len,
 	{
 	  while (p_orig < orig_end && *p_orig == ' ')
 	    res += *p_orig++;
-	  p_lcd = skip_spaces_const (p_lcd);
+	  p_lcd = skip_spaces (p_lcd);
 	}
       else
 	{
diff --git a/gdb/demangle.c b/gdb/demangle.c
index d034f4e..892ad18 100644
--- a/gdb/demangle.c
+++ b/gdb/demangle.c
@@ -174,20 +174,20 @@ demangle_command (char *args, int from_tty)
   while (processing_args
 	 && *arg_start == '-')
     {
-      const char *p = skip_to_space_const (arg_start);
+      const char *p = skip_to_space (arg_start);
 
       if (strncmp (arg_start, "-l", p - arg_start) == 0)
-	lang_name.reset (extract_arg_const (&p));
+	lang_name.reset (extract_arg (&p));
       else if (strncmp (arg_start, "--", p - arg_start) == 0)
 	processing_args = 0;
       else
 	{
-	  gdb::unique_xmalloc_ptr<char> option (extract_arg_const (&p));
+	  gdb::unique_xmalloc_ptr<char> option (extract_arg (&p));
 	  error (_("Unrecognized option '%s' to demangle command.  "
 		   "Try \"help demangle\"."), option.get ());
 	}
 
-      arg_start = skip_spaces_const (p);
+      arg_start = skip_spaces (p);
     }
 
   name = arg_start;
diff --git a/gdb/disasm.c b/gdb/disasm.c
index 5f22e78..cdab181 100644
--- a/gdb/disasm.c
+++ b/gdb/disasm.c
@@ -1044,7 +1044,7 @@ disassembler_options_completer (struct cmd_list_element *ignore,
       const char *separator = strrchr (text, ',');
       if (separator != NULL)
 	text = separator + 1;
-      text = skip_spaces_const (text);
+      text = skip_spaces (text);
       complete_on_enum (tracker, opts->name, text, word);
     }
 }
diff --git a/gdb/findcmd.c b/gdb/findcmd.c
index e35c224..f905e70 100644
--- a/gdb/findcmd.c
+++ b/gdb/findcmd.c
@@ -110,7 +110,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 	    }
 	}
 
-      s = skip_spaces_const (s);
+      s = skip_spaces (s);
     }
 
   /* Get the search range.  */
@@ -120,7 +120,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 
   if (*s == ',')
     ++s;
-  s = skip_spaces_const (s);
+  s = skip_spaces (s);
 
   if (*s == '+')
     {
@@ -171,7 +171,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
       struct type *t;
       ULONGEST pattern_buf_size_need;
 
-      s = skip_spaces_const (s);
+      s = skip_spaces (s);
 
       v = parse_to_comma_and_eval (&s);
       t = value_type (v);
@@ -220,7 +220,7 @@ parse_find_args (char *args, ULONGEST *max_countp,
 
       if (*s == ',')
 	++s;
-      s = skip_spaces_const (s);
+      s = skip_spaces (s);
     }
 
   if (pattern_buf_end == pattern_buf)
diff --git a/gdb/linespec.c b/gdb/linespec.c
index abe6615..b69ab62 100644
--- a/gdb/linespec.c
+++ b/gdb/linespec.c
@@ -474,7 +474,7 @@ linespec_lexer_lex_keyword (const char *p)
 	      if (i != IF_KEYWORD_INDEX)
 		{
 		  p += len;
-		  p = skip_spaces_const (p);
+		  p = skip_spaces (p);
 		  for (j = 0; linespec_keywords[j] != NULL; ++j)
 		    {
 		      int nextlen = strlen (linespec_keywords[j]);
@@ -709,7 +709,7 @@ linespec_lexer_lex_string (linespec_parser *parser)
 	{
 	  if (isspace (*PARSER_STREAM (parser)))
 	    {
-	      p = skip_spaces_const (PARSER_STREAM (parser));
+	      p = skip_spaces (PARSER_STREAM (parser));
 	      /* When we get here we know we've found something followed by
 		 a space (we skip over parens and templates below).
 		 So if we find a keyword now, we know it is a keyword and not,
@@ -856,7 +856,7 @@ linespec_lexer_lex_one (linespec_parser *parser)
   if (parser->lexer.current.type == LSTOKEN_CONSUMED)
     {
       /* Skip any whitespace.  */
-      PARSER_STREAM (parser) = skip_spaces_const (PARSER_STREAM (parser));
+      PARSER_STREAM (parser) = skip_spaces (PARSER_STREAM (parser));
 
       /* Check for a keyword, they end the linespec.  */
       keyword = linespec_lexer_lex_keyword (PARSER_STREAM (parser));
@@ -1770,7 +1770,7 @@ set_completion_after_number (linespec_parser *parser,
 {
   if (*PARSER_STREAM (parser) == ' ')
     {
-      parser->completion_word = skip_spaces_const (PARSER_STREAM (parser) + 1);
+      parser->completion_word = skip_spaces (PARSER_STREAM (parser) + 1);
       parser->complete_what = next;
     }
   else
@@ -2000,7 +2000,7 @@ linespec_parse_basic (linespec_parser *parser)
 		  if (ptr[i] == ' ')
 		    {
 		      LS_TOKEN_STOKEN (token).length = i;
-		      PARSER_STREAM (parser) = skip_spaces_const (ptr + i + 1);
+		      PARSER_STREAM (parser) = skip_spaces (ptr + i + 1);
 		      break;
 		    }
 		}
@@ -2697,7 +2697,7 @@ parse_linespec (linespec_parser *parser, const char *arg)
 	 advances past a keyword automatically, so skip it
 	 manually.  */
       parser->completion_word
-	= skip_spaces_const (skip_to_space_const (PARSER_STREAM (parser)));
+	= skip_spaces (skip_to_space (PARSER_STREAM (parser)));
       parser->complete_what = linespec_complete_what::EXPRESSION;
     }
 
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index 61ea13c..9ca1aca 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -440,7 +440,7 @@ read_mapping (const char *line,
     p++;
   *endaddr = strtoulst (p, &p, 16);
 
-  p = skip_spaces_const (p);
+  p = skip_spaces (p);
   *permissions = p;
   while (*p && !isspace (*p))
     p++;
@@ -448,7 +448,7 @@ read_mapping (const char *line,
 
   *offset = strtoulst (p, &p, 16);
 
-  p = skip_spaces_const (p);
+  p = skip_spaces (p);
   *device = p;
   while (*p && !isspace (*p))
     p++;
@@ -456,7 +456,7 @@ read_mapping (const char *line,
 
   *inode = strtoulst (p, &p, 10);
 
-  p = skip_spaces_const (p);
+  p = skip_spaces (p);
   *filename = p;
 }
 
@@ -740,7 +740,7 @@ linux_info_proc (struct gdbarch *gdbarch, const char *args,
       pid = current_inferior ()->pid;
     }
 
-  args = skip_spaces_const (args);
+  args = skip_spaces (args);
   if (args && args[0])
     error (_("Too many parameters: %s"), args);
 
@@ -870,7 +870,7 @@ linux_info_proc (struct gdbarch *gdbarch, const char *args,
 	  printf_filtered (_("Process: %s\n"),
 			   pulongest (strtoulst (p, &p, 10)));
 
-	  p = skip_spaces_const (p);
+	  p = skip_spaces (p);
 	  if (*p == '(')
 	    {
 	      /* ps command also relies on no trailing fields
@@ -884,7 +884,7 @@ linux_info_proc (struct gdbarch *gdbarch, const char *args,
 		}
 	    }
 
-	  p = skip_spaces_const (p);
+	  p = skip_spaces (p);
 	  if (*p)
 	    printf_filtered (_("State: %c\n"), *p++);
 
diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
index 6567e93..0e16f6a 100644
--- a/gdb/linux-thread-db.c
+++ b/gdb/linux-thread-db.c
@@ -1560,7 +1560,7 @@ info_auto_load_libthread_db (char *args, int from_tty)
   char *pids;
   int i;
 
-  cs = skip_spaces_const (cs);
+  cs = skip_spaces (cs);
   if (*cs)
     error (_("'info auto-load libthread-db' does not accept any parameters"));
 
diff --git a/gdb/location.c b/gdb/location.c
index 3238c9a..cda26e8 100644
--- a/gdb/location.c
+++ b/gdb/location.c
@@ -746,7 +746,7 @@ string_to_explicit_location (const char **argp,
       len = strlen (opt.get ());
 
       /* Get the argument string.  */
-      *argp = skip_spaces_const (*argp);
+      *argp = skip_spaces (*argp);
 
       /* All options have a required argument.  Checking for this
 	 required argument is deferred until later.  */
@@ -779,7 +779,7 @@ string_to_explicit_location (const char **argp,
       else if (strncmp (opt.get (), "-line", len) == 0)
 	{
 	  set_oarg (explicit_location_lex_one (argp, language, NULL));
-	  *argp = skip_spaces_const (*argp);
+	  *argp = skip_spaces (*argp);
 	  if (have_oarg)
 	    {
 	      EL_EXPLICIT (location)->line_offset
@@ -808,7 +808,7 @@ string_to_explicit_location (const char **argp,
 	  return location;
 	}
 
-      *argp = skip_spaces_const (*argp);
+      *argp = skip_spaces (*argp);
 
       /* It's a little lame to error after the fact, but in this
 	 case, it provides a much better user experience to issue
diff --git a/gdb/mi/mi-parse.c b/gdb/mi/mi-parse.c
index fea85d5..ad1478e 100644
--- a/gdb/mi/mi-parse.c
+++ b/gdb/mi/mi-parse.c
@@ -119,7 +119,7 @@ mi_parse_argv (const char *args, struct mi_parse *parse)
       char *arg;
 
       /* Skip leading white space.  */
-      chp = skip_spaces_const (chp);
+      chp = skip_spaces (chp);
       /* Three possibilities: EOF, quoted string, or other text. */
       switch (*chp)
 	{
@@ -242,7 +242,7 @@ mi_parse (const char *cmd, char **token)
   std::unique_ptr<struct mi_parse> parse (new struct mi_parse);
 
   /* Before starting, skip leading white space.  */
-  cmd = skip_spaces_const (cmd);
+  cmd = skip_spaces (cmd);
 
   /* Find/skip any token and then extract it.  */
   for (chp = cmd; *chp >= '0' && *chp <= '9'; chp++)
@@ -254,7 +254,7 @@ mi_parse (const char *cmd, char **token)
   /* This wasn't a real MI command.  Return it as a CLI_COMMAND.  */
   if (*chp != '-')
     {
-      chp = skip_spaces_const (chp);
+      chp = skip_spaces (chp);
       parse->command = xstrdup (chp);
       parse->op = CLI_COMMAND;
 
@@ -279,7 +279,7 @@ mi_parse (const char *cmd, char **token)
 		 _("Undefined MI command: %s"), parse->command);
 
   /* Skip white space following the command.  */
-  chp = skip_spaces_const (chp);
+  chp = skip_spaces (chp);
 
   /* Parse the --thread and --frame options, if present.  At present,
      some important commands, like '-break-*' are implemented by
@@ -352,7 +352,7 @@ mi_parse (const char *cmd, char **token)
 
 	  option = "--language";
 	  chp += ls;
-	  lang_name = extract_arg_const (&chp);
+	  lang_name = extract_arg (&chp);
 	  old_chain = make_cleanup (xfree, lang_name);
 
 	  parse->language = language_enum (lang_name);
@@ -367,7 +367,7 @@ mi_parse (const char *cmd, char **token)
 
       if (*chp != '\0' && !isspace (*chp))
 	error (_("Invalid value for the '%s' option"), option);
-      chp = skip_spaces_const (chp);
+      chp = skip_spaces (chp);
     }
 
   /* For new argv commands, attempt to return the parsed argument
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index 69b9e40..37edbd8 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -90,7 +90,7 @@ msymbol_hash_iw (const char *string)
 
   while (*string && *string != '(')
     {
-      string = skip_spaces_const (string);
+      string = skip_spaces (string);
       if (*string && *string != '(')
 	{
 	  hash = SYMBOL_HASH_NEXT (hash, *string);
diff --git a/gdb/nat/linux-procfs.c b/gdb/nat/linux-procfs.c
index cca35cb..8020a43 100644
--- a/gdb/nat/linux-procfs.c
+++ b/gdb/nat/linux-procfs.c
@@ -96,7 +96,7 @@ enum proc_state
 static enum proc_state
 parse_proc_status_state (const char *state)
 {
-  state = skip_spaces_const (state);
+  state = skip_spaces (state);
 
   switch (state[0])
     {
diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index a7d5762..033d687 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -2447,7 +2447,7 @@ ui_printf (const char *arg, struct ui_file *stream)
   if (s == 0)
     error_no_arg (_("format-control string and values to print"));
 
-  s = skip_spaces_const (s);
+  s = skip_spaces (s);
 
   /* A format string should follow, enveloped in double quotes.  */
   if (*s++ != '"')
@@ -2460,14 +2460,14 @@ ui_printf (const char *arg, struct ui_file *stream)
   if (*s++ != '"')
     error (_("Bad format string, non-terminated '\"'."));
   
-  s = skip_spaces_const (s);
+  s = skip_spaces (s);
 
   if (*s != ',' && *s != 0)
     error (_("Invalid argument syntax"));
 
   if (*s == ',')
     s++;
-  s = skip_spaces_const (s);
+  s = skip_spaces (s);
 
   {
     int nargs = 0;
diff --git a/gdb/probe.c b/gdb/probe.c
index 686e90e..7b3b888 100644
--- a/gdb/probe.c
+++ b/gdb/probe.c
@@ -558,12 +558,12 @@ parse_probe_linespec (const char *str, char **provider,
 {
   *probe_name = *objname = NULL;
 
-  *provider = extract_arg_const (&str);
+  *provider = extract_arg (&str);
   if (*provider != NULL)
     {
-      *probe_name = extract_arg_const (&str);
+      *probe_name = extract_arg (&str);
       if (*probe_name != NULL)
-	*objname = extract_arg_const (&str);
+	*objname = extract_arg (&str);
     }
 }
 
diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index 6156eb6..d57c2fa 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -673,7 +673,7 @@ bppy_init (PyObject *self, PyObject *args, PyObject *kwargs)
   TRY
     {
       gdb::unique_xmalloc_ptr<char>
-	copy_holder (xstrdup (skip_spaces_const (spec)));
+	copy_holder (xstrdup (skip_spaces (spec)));
       char *copy = copy_holder.get ();
 
       switch (type)
diff --git a/gdb/record.c b/gdb/record.c
index 7eef827..59fb240 100644
--- a/gdb/record.c
+++ b/gdb/record.c
@@ -431,7 +431,7 @@ get_insn_number (char **arg)
   const char *begin, *end, *pos;
 
   begin = *arg;
-  pos = skip_spaces_const (begin);
+  pos = skip_spaces (begin);
 
   if (!isdigit (*pos))
     error (_("Expected positive number, got: %s."), pos);
diff --git a/gdb/rust-exp.y b/gdb/rust-exp.y
index 5d99994..88c6623 100644
--- a/gdb/rust-exp.y
+++ b/gdb/rust-exp.y
@@ -1515,7 +1515,7 @@ lex_number (void)
   gdb_assert (subexps[0].rm_eo > 0);
   if (lexptr[subexps[0].rm_eo - 1] == '.')
     {
-      const char *next = skip_spaces_const (&lexptr[subexps[0].rm_eo]);
+      const char *next = skip_spaces (&lexptr[subexps[0].rm_eo]);
 
       if (rust_identifier_start_p (*next) || *next == '.')
 	{
diff --git a/gdb/serial.c b/gdb/serial.c
index 01294d1..91fdcbb 100644
--- a/gdb/serial.c
+++ b/gdb/serial.c
@@ -212,7 +212,7 @@ serial_open (const char *name)
       ops = serial_interface_lookup ("pipe");
       /* Discard ``|'' and any space before the command itself.  */
       ++open_name;
-      open_name = skip_spaces_const (open_name);
+      open_name = skip_spaces (open_name);
     }
   /* Check for a colon, suggesting an IP address/port pair.
      Do this *after* checking for all the interesting prefixes.  We
diff --git a/gdb/stack.c b/gdb/stack.c
index 2433009..f48fa1d 100644
--- a/gdb/stack.c
+++ b/gdb/stack.c
@@ -1285,7 +1285,7 @@ parse_frame_specification (const char *frame_exp, int *selected_frame_p)
 	  const char *p;
 
 	  /* Skip leading white space, bail of EOL.  */
-	  frame_exp = skip_spaces_const (frame_exp);
+	  frame_exp = skip_spaces (frame_exp);
 	  if (!*frame_exp)
 	    break;
 
diff --git a/gdb/stap-probe.c b/gdb/stap-probe.c
index c0cc662..3dc2d73 100644
--- a/gdb/stap-probe.c
+++ b/gdb/stap-probe.c
@@ -769,7 +769,7 @@ stap_parse_single_operand (struct stap_parse_info *p)
 	 We handle the register displacement here, and the other cases
 	 recursively.  */
       if (p->inside_paren_p)
-	tmp = skip_spaces_const (tmp);
+	tmp = skip_spaces (tmp);
 
       while (isdigit (*tmp))
 	{
@@ -818,7 +818,7 @@ stap_parse_single_operand (struct stap_parse_info *p)
       tmp = endp;
 
       if (p->inside_paren_p)
-	tmp = skip_spaces_const (tmp);
+	tmp = skip_spaces (tmp);
 
       /* If "stap_is_integer_prefix" returns true, it means we can
 	 accept integers without a prefix here.  But we also need to
@@ -901,7 +901,7 @@ stap_parse_argument_conditionally (struct stap_parse_info *p)
 	 have to parse it as it was a separate expression, without
 	 left-side or precedence.  */
       ++p->arg;
-      p->arg = skip_spaces_const (p->arg);
+      p->arg = skip_spaces (p->arg);
       ++p->inside_paren_p;
 
       stap_parse_argument_1 (p, 0, STAP_OPERAND_PREC_NONE);
@@ -913,7 +913,7 @@ stap_parse_argument_conditionally (struct stap_parse_info *p)
 
       ++p->arg;
       if (p->inside_paren_p)
-	p->arg = skip_spaces_const (p->arg);
+	p->arg = skip_spaces (p->arg);
     }
   else
     error (_("Cannot parse expression `%s'."), p->saved_arg);
@@ -935,7 +935,7 @@ stap_parse_argument_1 (struct stap_parse_info *p, int has_lhs,
   gdb_assert (p->arg != NULL);
 
   if (p->inside_paren_p)
-    p->arg = skip_spaces_const (p->arg);
+    p->arg = skip_spaces (p->arg);
 
   if (!has_lhs)
     {
@@ -981,7 +981,7 @@ stap_parse_argument_1 (struct stap_parse_info *p, int has_lhs,
 
       p->arg = tmp_exp_buf;
       if (p->inside_paren_p)
-	p->arg = skip_spaces_const (p->arg);
+	p->arg = skip_spaces (p->arg);
 
       /* Parse the right-side of the expression.  */
       stap_parse_argument_conditionally (p);
@@ -1074,7 +1074,7 @@ stap_parse_argument (const char **arg, struct type *atype,
 
   reallocate_expout (&p.pstate);
 
-  p.arg = skip_spaces_const (p.arg);
+  p.arg = skip_spaces (p.arg);
   *arg = p.arg;
 
   /* We can safely return EXPOUT here.  */
@@ -1189,7 +1189,7 @@ stap_parse_probe_arguments (struct stap_probe *probe, struct gdbarch *gdbarch)
       arg.aexpr = expr;
 
       /* Start it over again.  */
-      cur = skip_spaces_const (cur);
+      cur = skip_spaces (cur);
 
       VEC_safe_push (stap_probe_arg_s, probe->args_u.vec, &arg);
     }
diff --git a/gdb/tid-parse.c b/gdb/tid-parse.c
index 84e9bfe..83dc07c 100644
--- a/gdb/tid-parse.c
+++ b/gdb/tid-parse.c
@@ -229,7 +229,7 @@ tid_range_parser::get_tid_or_range (int *inf_num,
 	{
 	  /* Setup the number range parser to return numbers in the
 	     whole [1,INT_MAX] range.  */
-	  m_range_parser.setup_range (1, INT_MAX, skip_spaces_const (p + 1));
+	  m_range_parser.setup_range (1, INT_MAX, skip_spaces (p + 1));
 	  m_state = STATE_STAR_RANGE;
 	}
       else
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index dbd850f..437db59 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -618,7 +618,7 @@ decode_agent_options (const char *exp, int *trace_string)
   else
     error (_("Undefined collection format \"%c\"."), *exp);
 
-  exp = skip_spaces_const (exp);
+  exp = skip_spaces (exp);
 
   return exp;
 }
@@ -685,7 +685,7 @@ validate_actionline (const char *line, struct breakpoint *b)
   if (line == NULL)
     return;
 
-  p = skip_spaces_const (line);
+  p = skip_spaces (line);
 
   /* Symbol lookup etc.  */
   if (*p == '\0')	/* empty line: just prompt for another line.  */
@@ -708,7 +708,7 @@ validate_actionline (const char *line, struct breakpoint *b)
       do
 	{			/* Repeat over a comma-separated list.  */
 	  QUIT;			/* Allow user to bail out with ^C.  */
-	  p = skip_spaces_const (p);
+	  p = skip_spaces (p);
 
 	  if (*p == '$')	/* Look for special pseudo-symbols.  */
 	    {
@@ -771,7 +771,7 @@ validate_actionline (const char *line, struct breakpoint *b)
       do
 	{			/* Repeat over a comma-separated list.  */
 	  QUIT;			/* Allow user to bail out with ^C.  */
-	  p = skip_spaces_const (p);
+	  p = skip_spaces (p);
 
 	  tmp_p = p;
 	  for (loc = t->loc; loc; loc = loc->next)
@@ -801,7 +801,7 @@ validate_actionline (const char *line, struct breakpoint *b)
     {
       char *endp;
 
-      p = skip_spaces_const (p);
+      p = skip_spaces (p);
       t->step_count = strtol (p, &endp, 0);
       if (endp == p || t->step_count == 0)
 	error (_("while-stepping step count `%s' is malformed."), line);
@@ -1311,7 +1311,7 @@ encode_actions_1 (struct command_line *action,
     {
       QUIT;			/* Allow user to bail out with ^C.  */
       action_exp = action->line;
-      action_exp = skip_spaces_const (action_exp);
+      action_exp = skip_spaces (action_exp);
 
       cmd = lookup_cmd (&action_exp, cmdlist, "", -1, 1);
       if (cmd == 0)
@@ -1327,7 +1327,7 @@ encode_actions_1 (struct command_line *action,
 	  do
 	    {			/* Repeat over a comma-separated list.  */
 	      QUIT;		/* Allow user to bail out with ^C.  */
-	      action_exp = skip_spaces_const (action_exp);
+	      action_exp = skip_spaces (action_exp);
 
 	      if (0 == strncasecmp ("$reg", action_exp, 4))
 		{
@@ -1487,7 +1487,7 @@ encode_actions_1 (struct command_line *action,
 	  do
 	    {			/* Repeat over a comma-separated list.  */
 	      QUIT;		/* Allow user to bail out with ^C.  */
-	      action_exp = skip_spaces_const (action_exp);
+	      action_exp = skip_spaces (action_exp);
 
 		{
 		  struct cleanup *old_chain1 = NULL;
@@ -2733,7 +2733,7 @@ trace_dump_actions (struct command_line *action,
 
       QUIT;			/* Allow user to bail out with ^C.  */
       action_exp = action->line;
-      action_exp = skip_spaces_const (action_exp);
+      action_exp = skip_spaces (action_exp);
 
       /* The collection actions to be done while stepping are
          bracketed by the commands "while-stepping" and "end".  */
@@ -2776,7 +2776,7 @@ trace_dump_actions (struct command_line *action,
 		  QUIT;		/* Allow user to bail out with ^C.  */
 		  if (*action_exp == ',')
 		    action_exp++;
-		  action_exp = skip_spaces_const (action_exp);
+		  action_exp = skip_spaces (action_exp);
 
 		  next_comma = strchr (action_exp, ',');
 
