ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/target/linux/generic/hack-5.4/221-module_exports.patch b/target/linux/generic/hack-5.4/221-module_exports.patch
new file mode 100644
index 0000000..e8b775e
--- /dev/null
+++ b/target/linux/generic/hack-5.4/221-module_exports.patch
@@ -0,0 +1,109 @@
+From b14784e7883390c20ed3ff904892255404a5914b Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Fri, 7 Jul 2017 17:05:53 +0200
+Subject: add an optional config option for stripping all unnecessary symbol exports from the kernel image
+
+lede-commit: bb5a40c64b7c4f4848509fa0a6625055fc9e66cc
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ include/asm-generic/vmlinux.lds.h | 18 +++++++++++++++---
+ include/linux/export.h | 9 ++++++++-
+ scripts/Makefile.build | 2 +-
+ 3 files changed, 24 insertions(+), 5 deletions(-)
+
+--- a/include/asm-generic/vmlinux.lds.h
++++ b/include/asm-generic/vmlinux.lds.h
+@@ -54,6 +54,16 @@
+ #define LOAD_OFFSET 0
+ #endif
+
++#ifndef SYMTAB_KEEP
++#define SYMTAB_KEEP KEEP(*(SORT(___ksymtab+*)))
++#define SYMTAB_KEEP_GPL KEEP(*(SORT(___ksymtab_gpl+*)))
++#endif
++
++#ifndef SYMTAB_DISCARD
++#define SYMTAB_DISCARD
++#define SYMTAB_DISCARD_GPL
++#endif
++
+ /* Align . to a 8 byte boundary equals to maximum function alignment. */
+ #define ALIGN_FUNCTION() . = ALIGN(8)
+
+@@ -408,14 +418,14 @@
+ /* Kernel symbol table: Normal symbols */ \
+ __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
+ __start___ksymtab = .; \
+- KEEP(*(SORT(___ksymtab+*))) \
++ SYMTAB_KEEP \
+ __stop___ksymtab = .; \
+ } \
+ \
+ /* Kernel symbol table: GPL-only symbols */ \
+ __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
+ __start___ksymtab_gpl = .; \
+- KEEP(*(SORT(___ksymtab_gpl+*))) \
++ SYMTAB_KEEP_GPL \
+ __stop___ksymtab_gpl = .; \
+ } \
+ \
+@@ -477,7 +487,7 @@
+ \
+ /* Kernel symbol table: strings */ \
+ __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
+- *(__ksymtab_strings) \
++ *(__ksymtab_strings+*) \
+ } \
+ \
+ /* __*init sections */ \
+@@ -917,6 +927,8 @@
+ /DISCARD/ : { \
+ EXIT_DISCARDS \
+ EXIT_CALL \
++ SYMTAB_DISCARD \
++ SYMTAB_DISCARD_GPL \
+ *(.discard) \
+ *(.discard.*) \
+ *(.modinfo) \
+--- a/include/linux/export.h
++++ b/include/linux/export.h
+@@ -98,18 +98,26 @@ struct kernel_symbol {
+
+ #else
+
++#ifdef MODULE
++#define __EXPORT_SUFFIX(sym)
++#else
++#define __EXPORT_SUFFIX(sym) "+" #sym
++#endif
++
+ #define ___export_symbol_common(sym, sec) \
+ extern typeof(sym) sym; \
+ __CRC_SYMBOL(sym, sec); \
+ static const char __kstrtab_##sym[] \
+- __attribute__((section("__ksymtab_strings"), used, aligned(1))) \
++ __attribute__((section("__ksymtab_strings" \
++ __EXPORT_SUFFIX(sym)), used, aligned(1))) \
+ = #sym \
+
+ /* For every exported symbol, place a struct in the __ksymtab section */
+ #define ___EXPORT_SYMBOL_NS(sym, sec, ns) \
+ ___export_symbol_common(sym, sec); \
+ static const char __kstrtabns_##sym[] \
+- __attribute__((section("__ksymtab_strings"), used, aligned(1))) \
++ __attribute__((section("__ksymtab_strings" \
++ __EXPORT_SUFFIX(sym)), used, aligned(1))) \
+ = #ns; \
+ __KSYMTAB_ENTRY_NS(sym, sec)
+
+--- a/scripts/Makefile.build
++++ b/scripts/Makefile.build
+@@ -350,7 +350,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(
+ # Linker scripts preprocessor (.lds.S -> .lds)
+ # ---------------------------------------------------------------------------
+ quiet_cmd_cpp_lds_S = LDS $@
+- cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \
++ cmd_cpp_lds_S = $(CPP) $(EXTRA_LDSFLAGS) $(cpp_flags) -P -U$(ARCH) \
+ -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
+
+ $(obj)/%.lds: $(src)/%.lds.S FORCE