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9261e7447e
This makes the patches which were just copied in the previous commit apply on top of kernel 4.19. The patches in the backports-4.19 folder were checked if they are really in kernel 4.19 based on the title and only removed if they were found in the upstream kernel. The following additional patches form the pending folder went into upstream Linux 4.19: pending-4.19/171-usb-dwc2-Fix-inefficient-copy-of-unaligned-buffers.patch pending-4.19/190-2-5-e1000e-Fix-wrong-comment-related-to-link-detection.patch pending-4.19/478-mtd-spi-nor-Add-support-for-XM25QH64A-and-XM25QH128A.patch pending-4.19/479-mtd-spi-nor-add-eon-en25qh32.patch pending-4.19/950-tty-serial-exar-generalize-rs485-setup.patch pending-4.19/340-MIPS-mm-remove-mips_dma_mapping_error.patch Bigger changes were introduced to the m25p80 spi nor driver, as far as I saw it in the new code, it now has the functionality provided in this patch: pending-4.19/450-mtd-m25p80-allow-fallback-from-spi_flash_read-to-reg.patch Part of this patch went upstream independent of OpenWrt: hack-4.19/220-gc_sections.patch This patch was reworked to match the changes done upstream. The MIPS DMA API changed a lot, this patch was rewritten to match the new DMA handling: pending-4.19/341-MIPS-mm-remove-no-op-dma_map_ops-where-possible.patch I did bigger manual changes to the following patches and I am not 100% sure if they are all correct: pending-4.19/0931-w1-gpio-fix-problem-with-platfom-data-in-w1-gpio.patch pending-4.19/411-mtd-partial_eraseblock_write.patch pending-4.19/600-netfilter_conntrack_flush.patch pending-4.19/611-netfilter_match_bypass_default_table.patch pending-4.19/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch hack-4.19/211-host_tools_portability.patch hack-4.19/221-module_exports.patch hack-4.19/321-powerpc_crtsavres_prereq.patch hack-4.19/902-debloat_proc.patch This is based on patchset from Marko Ratkaj <marko.ratkaj@sartura.hr> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
102 lines
3.1 KiB
Diff
102 lines
3.1 KiB
Diff
From b14784e7883390c20ed3ff904892255404a5914b Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 7 Jul 2017 17:05:53 +0200
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Subject: add an optional config option for stripping all unnecessary symbol exports from the kernel image
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lede-commit: bb5a40c64b7c4f4848509fa0a6625055fc9e66cc
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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include/asm-generic/vmlinux.lds.h | 18 +++++++++++++++---
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include/linux/export.h | 9 ++++++++-
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scripts/Makefile.build | 2 +-
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3 files changed, 24 insertions(+), 5 deletions(-)
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--- a/include/asm-generic/vmlinux.lds.h
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+++ b/include/asm-generic/vmlinux.lds.h
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@@ -54,6 +54,16 @@
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#define LOAD_OFFSET 0
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#endif
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+#ifndef SYMTAB_KEEP
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+#define SYMTAB_KEEP KEEP(*(SORT(___ksymtab+*)))
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+#define SYMTAB_KEEP_GPL KEEP(*(SORT(___ksymtab_gpl+*)))
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+#endif
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+
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+#ifndef SYMTAB_DISCARD
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+#define SYMTAB_DISCARD
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+#define SYMTAB_DISCARD_GPL
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+#endif
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+
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/* Align . to a 8 byte boundary equals to maximum function alignment. */
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#define ALIGN_FUNCTION() . = ALIGN(8)
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@@ -372,14 +382,14 @@
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/* Kernel symbol table: Normal symbols */ \
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__ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
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__start___ksymtab = .; \
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- KEEP(*(SORT(___ksymtab+*))) \
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+ SYMTAB_KEEP \
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__stop___ksymtab = .; \
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} \
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\
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/* Kernel symbol table: GPL-only symbols */ \
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__ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
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__start___ksymtab_gpl = .; \
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- KEEP(*(SORT(___ksymtab_gpl+*))) \
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+ SYMTAB_KEEP_GPL \
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__stop___ksymtab_gpl = .; \
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} \
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\
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@@ -441,7 +451,7 @@
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\
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/* Kernel symbol table: strings */ \
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__ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
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- *(__ksymtab_strings) \
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+ *(__ksymtab_strings+*) \
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} \
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\
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/* __*init sections */ \
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@@ -841,6 +851,8 @@
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EXIT_TEXT \
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EXIT_DATA \
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EXIT_CALL \
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+ SYMTAB_DISCARD \
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+ SYMTAB_DISCARD_GPL \
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*(.discard) \
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*(.discard.*) \
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}
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--- a/include/linux/export.h
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+++ b/include/linux/export.h
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@@ -74,12 +74,19 @@ struct kernel_symbol {
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};
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#endif
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+#ifdef MODULE
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+#define __EXPORT_SUFFIX(sym)
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+#else
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+#define __EXPORT_SUFFIX(sym) "+" #sym
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+#endif
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+
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/* For every exported symbol, place a struct in the __ksymtab section */
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#define ___EXPORT_SYMBOL(sym, sec) \
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extern typeof(sym) sym; \
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__CRC_SYMBOL(sym, sec) \
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static const char __kstrtab_##sym[] \
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- __attribute__((section("__ksymtab_strings"), used, aligned(1))) \
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+ __attribute__((section("__ksymtab_strings" \
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+ __EXPORT_SUFFIX(sym)), used, aligned(1))) \
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= #sym; \
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__KSYMTAB_ENTRY(sym, sec)
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--- a/scripts/Makefile.build
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+++ b/scripts/Makefile.build
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@@ -408,7 +408,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(
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# Linker scripts preprocessor (.lds.S -> .lds)
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# ---------------------------------------------------------------------------
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quiet_cmd_cpp_lds_S = LDS $@
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- cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \
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+ cmd_cpp_lds_S = $(CPP) $(EXTRA_LDSFLAGS) $(cpp_flags) -P -U$(ARCH) \
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-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
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$(obj)/%.lds: $(src)/%.lds.S FORCE
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