linux-kernel - Re: [PATCH] RISC-V: kexec: Fix build error without CONFIG

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Date:   Wed, 1 Jun 2022 08:59:54 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Li Zhengyu <lizhengyu3@...wei.com>, palmer@...osinc.com,
        mick@....forth.gr
Cc:     paul.walmsley@...ive.com, aou@...s.berkeley.edu,
        liaochang1@...wei.com, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ebiederm@...ssion.com,
        kexec@...ts.infradead.org, linux-next@...r.kernel.org
Subject: Re: [PATCH] RISC-V: kexec: Fix build error without CONFIG_KEXEC



On 6/1/22 00:02, Li Zhengyu wrote:
> When CONFIG_KEXEC_FILE=y but CONFIG_KEXEC is not set:
> 
> kernel/kexec_core.o: In function `kimage_free':
> kexec_core.c:(.text+0xa0c): undefined reference to `machine_kexec_cleanup'
> kernel/kexec_core.o: In function `.L0 ':
> kexec_core.c:(.text+0xde8): undefined reference to `machine_crash_shutdown'
> kexec_core.c:(.text+0xdf4): undefined reference to `machine_kexec'
> kernel/kexec_core.o: In function `.L231':
> kexec_core.c:(.text+0xe1c): undefined reference to `riscv_crash_save_regs'
> kernel/kexec_core.o: In function `.L0 ':
> kexec_core.c:(.text+0x119e): undefined reference to `machine_shutdown'
> kernel/kexec_core.o: In function `.L312':
> kexec_core.c:(.text+0x11b2): undefined reference to `machine_kexec'
> kernel/kexec_file.o: In function `.L0 ':
> kexec_file.c:(.text+0xb84): undefined reference to `machine_kexec_prepare'
> kernel/kexec_file.o: In function `.L177':
> kexec_file.c:(.text+0xc5a): undefined reference to `machine_kexec_prepare'
> Makefile:1160: recipe for target 'vmlinux' failed
> make: *** [vmlinux] Error 1
> 
> These symbols should depend on CONFIG_KEXEC_CORE rather than CONFIG_KEXEC
> when kexec_file has been implemented on RISC-V, like the other archs have
> done.
> 
> Signed-off-by: Li Zhengyu <lizhengyu3@...wei.com>

Reported-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org>
Acked-by: Randy Dunlap <rdunlap@...radead.org>

thanks.

> ---
>  arch/riscv/kernel/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> index c71d6591d539..33bb60a354cd 100644
> --- a/arch/riscv/kernel/Makefile
> +++ b/arch/riscv/kernel/Makefile
> @@ -78,7 +78,7 @@ obj-$(CONFIG_SMP) += cpu_ops_sbi.o
>  endif
>  obj-$(CONFIG_HOTPLUG_CPU)	+= cpu-hotplug.o
>  obj-$(CONFIG_KGDB)		+= kgdb.o
> -obj-$(CONFIG_KEXEC)		+= kexec_relocate.o crash_save_regs.o machine_kexec.o
> +obj-$(CONFIG_KEXEC_CORE)	+= kexec_relocate.o crash_save_regs.o machine_kexec.o
>  obj-$(CONFIG_KEXEC_FILE)	+= elf_kexec.o machine_kexec_file.o
>  obj-$(CONFIG_CRASH_DUMP)	+= crash_dump.o
>  

-- 
~Randy