openwrt/target/linux/generic/patches-3.6/220-module_exports.patch

--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -52,6 +52,18 @@
 #define LOAD_OFFSET 0
 #endif
 
+#ifndef SYMTAB_KEEP_STR
+#define SYMTAB_KEEP *(SORT(___ksymtab+*))
+#define SYMTAB_KEEP_GPL *(SORT(___ksymtab_gpl+*))
+#define SYMTAB_KEEP_STR *(__ksymtab_strings+*)
+#endif
+
+#ifndef SYMTAB_DISCARD
+#define SYMTAB_DISCARD
+#define SYMTAB_DISCARD_GPL
+#define SYMTAB_DISCARD_STR
+#endif
+
 #ifndef SYMBOL_PREFIX
 #define VMLINUX_SYMBOL(sym) sym
 #else
@@ -276,14 +288,14 @@
 	/* Kernel symbol table: Normal symbols */			\
 	__ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {		\
 		VMLINUX_SYMBOL(__start___ksymtab) = .;			\
-		*(SORT(___ksymtab+*))					\
+		SYMTAB_KEEP						\
 		VMLINUX_SYMBOL(__stop___ksymtab) = .;			\
 	}								\
 									\
 	/* Kernel symbol table: GPL-only symbols */			\
 	__ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {	\
 		VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;		\
-		*(SORT(___ksymtab_gpl+*))				\
+		SYMTAB_KEEP_GPL						\
 		VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;		\
 	}								\
 									\
@@ -345,7 +357,7 @@
 									\
 	/* Kernel symbol table: strings */				\
         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {	\
-		*(__ksymtab_strings)					\
+		SYMTAB_KEEP_STR						\
 	}								\
 									\
 	/* __*init sections */						\
@@ -670,6 +682,9 @@
 	EXIT_TEXT							\
 	EXIT_DATA							\
 	EXIT_CALL							\
+	SYMTAB_DISCARD							\
+	SYMTAB_DISCARD_GPL						\
+	SYMTAB_DISCARD_STR						\
 	*(.discard)							\
 	*(.discard.*)							\
 	}
--- a/include/linux/export.h
+++ b/include/linux/export.h
@@ -45,12 +45,19 @@ extern struct module __this_module;
 #define __CRC_SYMBOL(sym, sec)
 #endif
 
+#ifdef MODULE
+#define __EXPORT_SUFFIX(sym)
+#else
+#define __EXPORT_SUFFIX(sym) "+" #sym
+#endif
+
 /* For every exported symbol, place a struct in the __ksymtab section */
 #define __EXPORT_SYMBOL(sym, sec)				\
 	extern typeof(sym) sym;					\
 	__CRC_SYMBOL(sym, sec)					\
 	static const char __kstrtab_##sym[]			\
-	__attribute__((section("__ksymtab_strings"), aligned(1))) \
+	__attribute__((section("__ksymtab_strings"		\
+	  __EXPORT_SUFFIX(sym)), aligned(1)))			\
 	= MODULE_SYMBOL_PREFIX #sym;				\
 	static const struct kernel_symbol __ksymtab_##sym	\
 	__used							\
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -348,7 +348,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(
 # Linker scripts preprocessor (.lds.S -> .lds)
 # ---------------------------------------------------------------------------
 quiet_cmd_cpp_lds_S = LDS     $@
-      cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
+      cmd_cpp_lds_S = $(CPP) $(EXTRA_LDSFLAGS) $(cpp_flags) -P -C -U$(ARCH) \
 	                     -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
 
 $(obj)/%.lds: $(src)/%.lds.S FORCE