Re: kexec build regression in linux-6.6.70 (linux-6.6.y LTS branch)

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Jan 10, 2025 at 10:33:28AM +0100, Lars Wendler wrote:
> Hello folks,
> 
> trying to build latest linux-6.6.y release (6.6.70) fails with the
> following error:
> 
>   LD      .tmp_vmlinux.kallsyms1
> ld: vmlinux.o: in function `__crash_kexec':
> (.text+0x1bf9c1): undefined reference to `machine_crash_shutdown'
> ld: vmlinux.o: in function `do_kexec_load':
> kexec.c:(.text+0x1c15bb): undefined reference to
>   `arch_kexec_protect_crashkres' ld: kexec.c:(.text+0x1c1611):
>   undefined reference to `arch_kexec_unprotect_crashkres' ld:
>   vmlinux.o: in function `__do_sys_kexec_file_load':
>   kexec_file.c:(.text+0x1c272a): undefined reference to
>   `arch_kexec_protect_crashkres' ld: kexec_file.c:(.text+0x1c2772):
>   undefined reference to `arch_kexec_unprotect_crashkres' make[2]: ***
>   [scripts/Makefile.vmlinux:37: vmlinux] Error 1 make[1]: ***
>   [/usr/src/linux-6.6.70/Makefile:1164: vmlinux] Error 2 make: ***
>   [Makefile:234: __sub-make] Error 2
> 
> 
> I suppose this is related to commit
> e5b1574a8ca28c40cf53eda43f6c3b016ed41e27 which is the only commit in
> question that changes kexec code between linux-6.6.69 and linux-6.6.70.

Yeah, this has been reported a number of times, I'll try to track down a
fix later today, sorry about this...

If you change your .config, it does work :)

thanks,

greg k-h