[openwrt/openwrt] generic: 6.6: remove kernel export stripping patch

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/f12179fa15d9e9b141b46f101999bdad3ba34f74

commit f12179fa15d9e9b141b46f101999bdad3ba34f74
Author: Robert Marko <robimarko at gmail.com>
AuthorDate: Wed May 15 10:57:06 2024 +0200

    generic: 6.6: remove kernel export stripping patch
    
    Our kernel export stripping has been broken on 6.6 from the start since
    upstream kernel really reworked stuff in ("kbuild: generate KSYMTAB entries
    by modpost") and other commits as well.
    
    So, until this is either fixed or reworked lets drop the patch as it doesnt
    make sense to carry it knowing its broken and it can always be easily
    restored.
    
    Link: https://github.com/openwrt/openwrt/pull/15498
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 .../generic/hack-6.6/221-module_exports.patch      | 102 ---------------------
 1 file changed, 102 deletions(-)

diff --git a/target/linux/generic/hack-6.6/221-module_exports.patch b/target/linux/generic/hack-6.6/221-module_exports.patch
deleted file mode 100644
index 294944a34b..0000000000
--- a/target/linux/generic/hack-6.6/221-module_exports.patch
+++ /dev/null
@@ -1,102 +0,0 @@
-From b14784e7883390c20ed3ff904892255404a5914b Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd at 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 at 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
-@@ -81,6 +81,16 @@
- #define RO_EXCEPTION_TABLE
- #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 . function alignment. */
- #define ALIGN_FUNCTION()  . = ALIGN(CONFIG_FUNCTION_ALIGNMENT)
- 
-@@ -486,14 +496,14 @@
- 	/* 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 = .;				\
- 	}								\
- 									\
-@@ -513,7 +523,7 @@
- 									\
- 	/* Kernel symbol table: strings */				\
-         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {	\
--		*(__ksymtab_strings)					\
-+		*(__ksymtab_strings+*)					\
- 	}								\
- 									\
- 	/* __*init sections */						\
-@@ -1000,6 +1010,8 @@
- #define COMMON_DISCARDS							\
- 	SANITIZER_DISCARDS						\
- 	PATCHABLE_DISCARDS						\
-+	SYMTAB_DISCARD							\
-+	SYMTAB_DISCARD_GPL						\
- 	*(.discard)							\
- 	*(.discard.*)							\
- 	*(.export_symbol)						\
---- a/include/linux/export-internal.h
-+++ b/include/linux/export-internal.h
-@@ -26,6 +26,12 @@
- #define __KSYM_REF(sym)		".long " #sym
- #endif
- 
-+#ifdef MODULE
-+#define __EXPORT_SUFFIX(sym)
-+#else
-+#define __EXPORT_SUFFIX(sym) "+" #sym
-+#endif
-+
- /*
-  * For every exported symbol, do the following:
-  *
-@@ -38,7 +44,7 @@
-  * former apparently works on all arches according to the binutils source.
-  */
- #define __KSYMTAB(name, sym, sec, ns)						\
--	asm("	.section \"__ksymtab_strings\",\"aMS\",%progbits,1"	"\n"	\
-+	asm("	.section \"__ksymtab_strings" __EXPORT_SUFFIX(sym) "\",\"aMS\",%progbits,1"	"\n"	\
- 	    "__kstrtab_" #name ":"					"\n"	\
- 	    "	.asciz \"" #name "\""					"\n"	\
- 	    "__kstrtabns_" #name ":"					"\n"	\
---- a/scripts/Makefile.build
-+++ b/scripts/Makefile.build
-@@ -366,7 +366,7 @@ targets += $(real-dtb-y) $(lib-y) $(alwa
- # 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