LoongArch: Fix the write_fcsr() macro LoongArch: Fix module relocation error with binutils 2.41
arch/loongarch/Makefile | 2 ++ arch/loongarch/include/asm/loongarch.h | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-)
linux-next inclusion from next-20230616 commit 346dc929623cef70ff7832a4fa0ffd1b696e312a category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I80YEI CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?...
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The "write_fcsr()" macro uses wrong the positions for val and dest in asm. Fix it!
Reported-by: Miao HAO haomiao19@mails.ucas.ac.cn Signed-off-by: Qi Hu huqi@loongson.cn Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Hongchen Zhang zhanghongchen@loongson.cn --- arch/loongarch/include/asm/loongarch.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/include/asm/loongarch.h b/arch/loongarch/include/asm/loongarch.h index 33a8fa446ba9..0b8c1bde008f 100644 --- a/arch/loongarch/include/asm/loongarch.h +++ b/arch/loongarch/include/asm/loongarch.h @@ -1521,7 +1521,7 @@ __BUILD_CSR_OP(tlbidx) #define write_fcsr(dest, val) \ do { \ __asm__ __volatile__( \ - " movgr2fcsr %0, "__stringify(dest)" \n" \ + " movgr2fcsr "__stringify(dest)", %0 \n" \ : : "r" (val)); \ } while (0)
stable inclusion from stable-v6.5-rc4 commit 03c53eb90c0c61885b2175adf8675fb56df7f8db 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=v...
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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: WANG Xuerui git@xen0n.name Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Hongchen Zhang zhanghongchen@loongson.cn --- arch/loongarch/Makefile | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 345dc10576d4..a0f194da592b 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -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
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