[11/27] Convert block_linkage_function to method

diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index 7830fff6d8e..2602700e0ce 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -5309,7 +5309,7 @@  remove_irrelevant_renamings (std::vector<struct block_symbol> *syms,
   if (current_block == NULL)
     return;
 
-  current_function = block_linkage_function (current_block);
+  current_function = current_block->linkage_function ();
   if (current_function == NULL)
     return;
 
diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index fc214e7dfe1..f4f9b150c46 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -1887,7 +1887,7 @@  op_this_operation::do_generate_ax (struct expression *exp,
   const struct language_defn *lang;
 
   b = block_for_pc (ax->scope);
-  func = block_linkage_function (b);
+  func = b->linkage_function ();
   lang = language_def (func->language ());
 
   sym = lookup_language_this (lang, b).symbol;
diff --git a/gdb/block.c b/gdb/block.c
index fc523332a3d..dca6ff36f3b 100644
--- a/gdb/block.c
+++ b/gdb/block.c
@@ -86,15 +86,13 @@  contained_in (const struct block *a, const struct block *b,
   return false;
 }
 
-
-/* Return the symbol for the function which contains a specified
-   lexical block, described by a struct block BL.  The return value
-   will not be an inlined function; the containing function will be
-   returned instead.  */
+/* See block.h.  */
 
 struct symbol *
-block_linkage_function (const struct block *bl)
+block::linkage_function () const
 {
+  const block *bl = this;
+
   while ((bl->function () == NULL || bl->inlined_p ())
 	 && bl->superblock () != NULL)
     bl = bl->superblock ();
diff --git a/gdb/block.h b/gdb/block.h
index 680b7d0161e..d1f4409d863 100644
--- a/gdb/block.h
+++ b/gdb/block.h
@@ -231,6 +231,13 @@  struct block
 
   void set_using (struct using_direct *using_decl, struct obstack *obstack);
 
+  /* Return the symbol for the function which contains a specified
+     lexical block, described by a struct block.  The return value
+     will not be an inlined function; the containing function will be
+     returned instead.  */
+
+  struct symbol *linkage_function () const;
+
   /* Addresses in the executable code that are in this block.  */
 
   CORE_ADDR m_start;
@@ -364,8 +371,6 @@  struct blockvector
   struct block *m_blocks[1];
 };
 
-extern struct symbol *block_linkage_function (const struct block *);
-
 extern struct symbol *block_containing_function (const struct block *);
 
 /* Return true if block A is lexically nested within block B, or if a
diff --git a/gdb/blockframe.c b/gdb/blockframe.c
index 2796fc99154..65183b1946b 100644
--- a/gdb/blockframe.c
+++ b/gdb/blockframe.c
@@ -91,7 +91,7 @@  get_pc_function_start (CORE_ADDR pc)
   bl = block_for_pc (pc);
   if (bl)
     {
-      struct symbol *symbol = block_linkage_function (bl);
+      struct symbol *symbol = bl->linkage_function ();
 
       if (symbol)
 	{
@@ -139,7 +139,7 @@  find_pc_sect_function (CORE_ADDR pc, struct obj_section *section)
 
   if (b == 0)
     return 0;
-  return block_linkage_function (b);
+  return b->linkage_function ();
 }
 
 /* Return the function containing pc value PC.
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 00cc2ab401c..475a16e8d73 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -9194,7 +9194,7 @@  resolve_sal_pc (struct symtab_and_line *sal)
 				    sal->symtab->compunit ());
       if (bv != NULL)
 	{
-	  sym = block_linkage_function (b);
+	  sym = b->linkage_function ();
 	  if (sym != NULL)
 	    {
 	      fixup_symbol_section (sym, sal->symtab->compunit ()->objfile ());
diff --git a/gdb/compile/compile-loc2c.c b/gdb/compile/compile-loc2c.c
index 517cf89b9d2..853535258dc 100644
--- a/gdb/compile/compile-loc2c.c
+++ b/gdb/compile/compile-loc2c.c
@@ -892,7 +892,7 @@  do_compile_dwarf_expr_to_c (int indent, string_file *stream,
 	    if (!b)
 	      error (_("No block found for address"));
 
-	    framefunc = block_linkage_function (b);
+	    framefunc = b->linkage_function ();
 
 	    if (!framefunc)
 	      error (_("No function found for block"));
diff --git a/gdb/dwarf2/expr.c b/gdb/dwarf2/expr.c
index eecd18f59c9..5d597bfa9a6 100644
--- a/gdb/dwarf2/expr.c
+++ b/gdb/dwarf2/expr.c
@@ -771,7 +771,7 @@  dwarf_expr_context::get_frame_base (const gdb_byte **start,
   /* Use block_linkage_function, which returns a real (not inlined)
      function, instead of get_frame_function, which may return an
      inlined function.  */
-  symbol *framefunc = block_linkage_function (bl);
+  symbol *framefunc = bl->linkage_function ();
 
   /* If we found a frame-relative symbol then it was certainly within
      some function associated with a frame. If we can't find the frame,
diff --git a/gdb/dwarf2/loc.c b/gdb/dwarf2/loc.c
index fe91d609f19..92003c39d0e 100644
--- a/gdb/dwarf2/loc.c
+++ b/gdb/dwarf2/loc.c
@@ -451,7 +451,7 @@  dwarf2_find_location_expression (struct dwarf2_loclist_baton *baton,
 	  struct symbol *pc_func = NULL;
 
 	  if (pc_block)
-	    pc_func = block_linkage_function (pc_block);
+	    pc_func = pc_block->linkage_function ();
 
 	  if (pc_func && pc == pc_func->value_block ()->entry_pc ())
 	    {
@@ -2647,7 +2647,7 @@  dwarf2_compile_expr_to_ax (struct agent_expr *expr, struct axs_value *loc,
 	    if (!b)
 	      error (_("No block found for address"));
 
-	    framefunc = block_linkage_function (b);
+	    framefunc = b->linkage_function ();
 
 	    if (!framefunc)
 	      error (_("No function found for block"));
@@ -3173,7 +3173,7 @@  locexpr_describe_location_piece (struct symbol *symbol, struct ui_file *stream,
 	error (_("No block found for address for symbol \"%s\"."),
 	       symbol->print_name ());
 
-      framefunc = block_linkage_function (b);
+      framefunc = b->linkage_function ();
 
       if (!framefunc)
 	error (_("No function found for block for symbol \"%s\"."),
diff --git a/gdb/parse.c b/gdb/parse.c
index 2f7d58061ab..4c20b91f238 100644
--- a/gdb/parse.c
+++ b/gdb/parse.c
@@ -488,7 +488,7 @@  parse_exp_in_context (const char **stringptr, CORE_ADDR pc,
 	 the current frame language to parse the expression.  That's why
 	 we do the following language detection only if the context block
 	 has been specifically provided.  */
-      struct symbol *func = block_linkage_function (block);
+      struct symbol *func = block->linkage_function ();
 
       if (func != NULL)
 	lang = language_def (func->language ());