allow unwinder to build without module support

From: "Jan Beulich" <jbeulich@novell.com>
Add proper conditionals to be able to build with CONFIG_MODULES=n.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 include/linux/unwind.h |    8 ++++++++
 kernel/unwind.c        |    4 ++++
 2 files changed, 12 insertions(+)

Index: linux/include/linux/unwind.h
===================================================================
--- linux.orig/include/linux/unwind.h
+++ linux/include/linux/unwind.h
@@ -29,12 +29,16 @@ struct module;
  */
 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 *,
                                   /*const*/ struct pt_regs *);
@@ -72,6 +76,8 @@ struct unwind_frame_info {};
 
 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)
@@ -79,6 +85,8 @@ static inline void *unwind_add_table(str
 	return NULL;
 }
 
+#endif
+
 static inline void unwind_remove_table(void *handle, int init_only)
 {
 }
Index: linux/kernel/unwind.c
===================================================================
--- linux.orig/kernel/unwind.c
+++ linux/kernel/unwind.c
@@ -172,6 +172,8 @@ void __init unwind_init(void)
 	                  __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,
@@ -253,6 +255,8 @@ void unwind_remove_table(void *handle, i
 		kfree(table);
 }
 
+#endif /* CONFIG_MODULES */
+
 static uleb128_t get_uleb128(const u8 **pcur, const u8 *end)
 {
 	const u8 *cur = *pcur;