[PATCH] x86_64: allow unwinder to build without module support

Add proper conditionals to be able to build with CONFIG_MODULES=n.

Signed-off-by: Jan Beulich <[e-mail]>
Signed-off-by: Andi Kleen <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

include/linux/unwind.h

···
  */
 extern void unwind_init(void);
 
+#ifdef CONFIG_MODULES
+
 extern void *unwind_add_table(struct module *,
                               const void *table_start,
                               unsigned long table_size);
 
 extern void unwind_remove_table(void *handle, int init_only);
+
+#endif
 
 extern int unwind_init_frame_info(struct unwind_frame_info *,
                                   struct task_struct *,
···
 
 static inline void unwind_init(void) {}
 
+#ifdef CONFIG_MODULES
+
 static inline void *unwind_add_table(struct module *mod,
                                      const void *table_start,
                                      unsigned long table_size)
 {
 	return NULL;
 }
+
+#endif
 
 static inline void unwind_remove_table(void *handle, int init_only)
 {

kernel/unwind.c

···
 	                  __start_unwind, __end_unwind - __start_unwind);
 }
 
+#ifdef CONFIG_MODULES
+
 /* Must be called with module_mutex held. */
 void *unwind_add_table(struct module *module,
                        const void *table_start,
···
 	if (info.table)
 		kfree(table);
 }
+
+#endif /* CONFIG_MODULES */
 
 static uleb128_t get_uleb128(const u8 **pcur, const u8 *end)
 {