linux-kernel - Re: [PATCH linux-next v3 00/14] Split crash out from kexec and clean up related config items

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Date: Fri, 26 Jan 2024 14:07:27 +0800
From: Baoquan He <bhe@...hat.com>
To: Nathan Chancellor <nathan@...nel.org>
Cc: linux-kernel@...r.kernel.org, kexec@...ts.infradead.org, x86@...nel.org,
	linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-mips@...r.kernel.org, linux-riscv@...ts.infradead.org,
	loongarch@...ts.linux.dev, akpm@...ux-foundation.org,
	ebiederm@...ssion.com, hbathini@...ux.ibm.com, piliu@...hat.com,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH linux-next v3 00/14] Split crash out from kexec and clean
 up related config items

On 01/25/24 at 09:55pm, Nathan Chancellor wrote:
..... 
> I am seeing a few build failures in my test matrix on next-20240125 that
> appear to be caused by this series although I have not bisected. Some
> reproduction steps:

Thanks for trying this, I have reproduced the linking failure on arm,
will work out a way to fix it.

It's weird, I remember I have built these and passed.

> 
> $ curl -LSso .config https://git.alpinelinux.org/aports/plain/community/linux-edge/config-edge.armv7
> $ make -skj"$(nproc)" ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- olddefconfig all
> ...
> arm-linux-gnueabi-ld: arch/arm/kernel/machine_kexec.o: in function `arch_crash_save_vmcoreinfo':
> machine_kexec.c:(.text+0x488): undefined reference to `vmcoreinfo_append_str'
> ...
> 
> $ curl -LSso .config https://github.com/archlinuxarm/PKGBUILDs/raw/master/core/linux-aarch64/config
> $ make -skj"$(nproc)" ARCH=arm64 CROSS_COMPILE=aarch64-linux- olddefconfig all
> ...
> aarch64-linux-ld: kernel/kexec_file.o: in function `kexec_walk_memblock.constprop.0':
> kexec_file.c:(.text+0x314): undefined reference to `crashk_res'
> aarch64-linux-ld: kernel/kexec_file.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `crashk_res' which may bind externally can not be used when making a shared object; recompile with -fPIC
> kexec_file.c:(.text+0x314): dangerous relocation: unsupported relocation
> aarch64-linux-ld: kexec_file.c:(.text+0x318): undefined reference to `crashk_res'
> aarch64-linux-ld: drivers/of/kexec.o: in function `of_kexec_alloc_and_setup_fdt':
> kexec.c:(.text+0x580): undefined reference to `crashk_res'
> aarch64-linux-ld: drivers/of/kexec.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `crashk_res' which may bind externally can not be used when making a shared object; recompile with -fPIC
> kexec.c:(.text+0x580): dangerous relocation: unsupported relocation
> aarch64-linux-ld: kexec.c:(.text+0x584): undefined reference to `crashk_res'
> aarch64-linux-ld: kexec.c:(.text+0x590): undefined reference to `crashk_res'
> aarch64-linux-ld: kexec.c:(.text+0x5b0): undefined reference to `crashk_low_res'
> aarch64-linux-ld: drivers/of/kexec.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `crashk_low_res' which may bind externally can not be used when making a shared object; recompile with -fPIC
> kexec.c:(.text+0x5b0): dangerous relocation: unsupported relocation
> aarch64-linux-ld: kexec.c:(.text+0x5b4): undefined reference to `crashk_low_res'
> aarch64-linux-ld: kexec.c:(.text+0x5c0): undefined reference to `crashk_low_res'
> ...
> 
> $ curl -LSso .config https://git.alpinelinux.org/aports/plain/community/linux-edge/config-edge.x86_64
> $ make -skj"$(nproc)" ARCH=x86_64 CROSS_COMPILE=x86_64-linux- olddefconfig all
> ...
> x86_64-linux-ld: arch/x86/xen/mmu_pv.o: in function `paddr_vmcoreinfo_note':
> mmu_pv.c:(.text+0x3af3): undefined reference to `vmcoreinfo_note'
> ...
> 
> Cheers,
> Nathan
>