Commit bc197f7d authored by Huacai Chen's avatar Huacai Chen Committed by Hongchen Zhang
Browse files

LoongArch: Fix module relocation error with binutils 2.41 

mainline inclusion
from mainline-v6.5-rc4
commit 03c53eb9
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I80YEI
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.5.2&id=03c53eb90c0c61885b2175adf8675fb56df7f8db



---------------------------

Binutils 2.41 enables linker relaxation by default, but the kernel
module loader doesn't support that, so just disable it. Otherwise we
get such an error when loading modules:

"Unknown relocation type 102"

As an alternative, we could add linker relaxation support in the kernel
module loader. But it is relatively large complexity that may or may not
bring a similar gain, and we don't really want to include this linker
pass in the kernel.

Reviewed-by: default avatarWANG Xuerui <git@xen0n.name>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 8c5a9c80

arch/loongarch/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -55,6 +55,8 @@ LDFLAGS_vmlinux += -G0 -static -n -nostdlib 
ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS

cflags-y			+= -mexplicit-relocs

KBUILD_CFLAGS_KERNEL		+= -mdirect-extern-access

KBUILD_AFLAGS_MODULE		+= $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)

KBUILD_CFLAGS_MODULE		+= $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)

else

cflags-y			+= $(call cc-option,-mno-explicit-relocs)

KBUILD_AFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel