4 files changed, 21 insertions, 0 deletions

diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 4ce48e878530..d083561337f2 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -14,6 +14,9 @@ extern char __kprobes_text_start[], __kprobes_text_end[];
 extern char __initdata_begin[], __initdata_end[];
 extern char __start_rodata[], __end_rodata[];
 
+/* Start and end of .ctors section - used for constructor calls. */
+extern char __ctors_start[], __ctors_end[];
+
 /* function descriptor handling (if any).  Override
  * in asm/sections.h */
 #ifndef dereference_function_descriptor
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 6bdba10fef4a..55413e568f07 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -440,12 +440,21 @@
                 INIT_TASK                                               \
         }
 
+#ifdef CONFIG_CONSTRUCTORS
+#define KERNEL_CTORS()  VMLINUX_SYMBOL(__ctors_start) = .; \
+                        *(.ctors)                          \
+                        VMLINUX_SYMBOL(__ctors_end) = .;
+#else
+#define KERNEL_CTORS()
+#endif
+
 /* init and exit section handling */
 #define INIT_DATA                                                       \
         *(.init.data)                                                   \
         DEV_DISCARD(init.data)                                          \
         CPU_DISCARD(init.data)                                          \
         MEM_DISCARD(init.data)                                          \
+        KERNEL_CTORS()                                                  \
         *(.init.rodata)                                                 \
         DEV_DISCARD(init.rodata)                                        \
         CPU_DISCARD(init.rodata)                                        \
diff --git a/include/linux/init.h b/include/linux/init.h
index 8c2c9989626d..13b633ed695e 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -134,6 +134,9 @@ typedef void (*exitcall_t)(void);
 extern initcall_t __con_initcall_start[], __con_initcall_end[];
 extern initcall_t __security_initcall_start[], __security_initcall_end[];
 
+/* Used for contructor calls. */
+typedef void (*ctor_fn_t)(void);
+
 /* Defined in init/main.c */
 extern int do_one_initcall(initcall_t fn);
 extern char __initdata boot_command_line[];
diff --git a/include/linux/module.h b/include/linux/module.h
index 505f20dcc1c7..098bdb7bfacf 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -363,6 +363,12 @@ struct module
         local_t ref;
 #endif
 #endif
+
+#ifdef CONFIG_CONSTRUCTORS
+        /* Constructor functions. */
+        ctor_fn_t *ctors;
+        unsigned int num_ctors;
+#endif
 };
 #ifndef MODULE_ARCH_INIT
 #define MODULE_ARCH_INIT {}