kernel: use -ffunction-sections, -fdata-sections and --gc-sections on mips

in combination with kernel symbol export stripping this significantly reduces
the kernel image size

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35320 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 0 insertions, 91 deletions

diff --git a/target/linux/generic/patches-3.7/220-module_exports.patch b/target/linux/generic/patches-3.7/220-module_exports.patch
deleted file mode 100644
index fc382c16f..000000000
--- a/target/linux/generic/patches-3.7/220-module_exports.patch
+++ /dev/null
@@ -1,91 +0,0 @@
---- 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 */						\
-@@ -679,6 +691,9 @@
- 	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