diff options
| author | Arvind Sankar <nivedita@alum.mit.edu> | 2020-07-22 14:43:34 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-07-24 16:39:27 +0200 |
| commit | 587af649bcc04eb016822f209a975005c0092151 (patch) | |
| tree | dd1b206f3dc12a55dca76adbf77b23f998f296b5 /arch/x86/Makefile | |
| parent | 6526b12de07588253a52577f42ec99fc7ca26a1f (diff) | |
x86/build: Move max-page-size option to LDFLAGS_vmlinux
This option is only required for vmlinux on 64-bit, to enforce 2MiB
alignment, so set it in LDFLAGS_vmlinux instead of KBUILD_LDFLAGS. Also
drop the ld-option check: this option was added in binutils-2.18 and all
the other places that use it already don't have the check.
This reduces the size of the intermediate ELF files
arch/x86/boot/setup.elf and arch/x86/realmode/rm/realmode.elf by about
2MiB each. The binary versions are unchanged.
Move the LDFLAGS settings to all be together and just after CFLAGS
settings are done.
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Michal Marek <michal.lkml@markovi.net>
Link: https://lore.kernel.org/r/20200722184334.3785418-1-nivedita@alum.mit.edu
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | arch/x86/Makefile | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 00e378de8bc0..1e634d7ee6eb 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -47,10 +47,6 @@ export REALMODE_CFLAGS # e.g.: obj-y += foo_$(BITS).o export BITS -ifdef CONFIG_X86_NEED_RELOCS - LDFLAGS_vmlinux := --emit-relocs --discard-none -endif - # # Prevent GCC from generating any FP code by mistake. # @@ -177,17 +173,6 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) endif -KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) - -# -# The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to -# the linker to force 2MB page size regardless of the default page size used -# by the linker. -# -ifdef CONFIG_X86_64 -KBUILD_LDFLAGS += $(call ld-option, -z max-page-size=0x200000) -endif - # Workaround for a gcc prelease that unfortunately was shipped in a suse release KBUILD_CFLAGS += -Wno-sign-compare # @@ -207,6 +192,23 @@ ifdef CONFIG_RETPOLINE endif endif +KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) + +ifdef CONFIG_X86_NEED_RELOCS +LDFLAGS_vmlinux := --emit-relocs --discard-none +else +LDFLAGS_vmlinux := +endif + +# +# The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to +# the linker to force 2MB page size regardless of the default page size used +# by the linker. +# +ifdef CONFIG_X86_64 +LDFLAGS_vmlinux += -z max-page-size=0x200000 +endif + archscripts: scripts_basic $(Q)$(MAKE) $(build)=arch/x86/tools relocs |