2 Commits

Author	SHA1	Message	Date
Sami Tolvanen	76df447444	FROMLIST: kbuild: lto: merge module sections ... LLD always splits sections with LTO, which increases module sizes. This change adds linker script rules to merge the split sections in the final module. Bug: 145210207 Change-Id: Id0b964e732b5c72177d8f6dc0f75114551445b97 Link: https://lore.kernel.org/lkml/20201211184633.3213045-6-samitolvanen@google.com/ Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org>	2020-12-16 08:56:33 -08:00
Masahiro Yamada	596b0474d3	kbuild: preprocess module linker script ... There was a request to preprocess the module linker script like we do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512) The difference between vmlinux.lds and module.lds is that the latter is needed for external module builds, thus must be cleaned up by 'make mrproper' instead of 'make clean'. Also, it must be created by 'make modules_prepare'. You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by 'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to arch/$(SRCARCH)/include/asm/module.lds.h, which is included from scripts/module.lds.S. scripts/module.lds is fine because 'make clean' keeps all the build artifacts under scripts/. You can add arch-specific sections in <asm/module.lds.h>. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Jessica Yu <jeyu@kernel.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Jessica Yu <jeyu@kernel.org>	2020-09-25 00:36:41 +09:00