Re: [PATCH 5.10 000/131] 5.10.44-rc1 review

[Greg Kroah-Hartman]

On Mon, Jun 14, 2021 at 05:36:45PM +0200, Holger Hoffstätte wrote:
> On 2021-06-14 12:26, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 5.10.44 release.
> 
> Hmm..I build my kernel with BTF for bpftrace and this gives me:
> 
> ...
>   CC      init/version.o
>   AR      init/built-in.a
>   LD      vmlinux.o
>   MODPOST vmlinux.symvers
>   MODINFO modules.builtin.modinfo
>   GEN     modules.builtin
>   LD      .tmp_vmlinux.btf
>   BTF     .btf.vmlinux.bin.o
>   LD      .tmp_vmlinux.kallsyms1
>   KSYMS   .tmp_vmlinux.kallsyms1.S
>   AS      .tmp_vmlinux.kallsyms1.S
>   LD      .tmp_vmlinux.kallsyms2
>   KSYMS   .tmp_vmlinux.kallsyms2.S
>   AS      .tmp_vmlinux.kallsyms2.S
>   LD      vmlinux
>   BTFIDS  vmlinux
> FAILED unresolved symbol migrate_enable
> 
> thanks to:
> 
> > Jiri Olsa <jolsa@xxxxxxxxxx>
> >      bpf: Add deny list of btf ids check for tracing programs
> 
> When I revert this it builds fine, just like before. Maybe a missing
> requirement or followup fix? I didn't find anything with a quick search.
> Using gcc-11, if it matters.

Looks like we need the change that exported this function, let me see if
it's worth to add that, or to revert this one...

thanks,

greg k-h