Re: progs/test_ksyms_btf.c:37:21: error: no member named 'cpu' in 'struct rq'

[Chen, Rong A]

On 10/30/2022 6:04 AM, Andres Freund wrote:
> Hi,
>
> On 2022-10-27 05:02:14 +0800, kernel test robot wrote:
> > First bad commit (maybe != root cause):
> >
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   98555239e4c3aab1810d84073166eef6d54eeb3d
> > commit: 600b7b26c07a070d0153daa76b3806c1e52c9e00 tools bpftool: Fix compilation error with new binutils
> > date:   3 months ago
> > compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
> > reproduce:
> >          # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=600b7b26c07a070d0153daa76b3806c1e52c9e00
> >          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> >          git fetch --no-tags linus master
> >          git checkout 600b7b26c07a070d0153daa76b3806c1e52c9e00
> >          make O=/tmp/kselftest headers
> >          make O=/tmp/kselftest -C tools/testing/selftests
> >
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <lkp@xxxxxxxxx>
> >
> > All errors (new ones prefixed by >>):
> >
> > > > progs/test_ksyms_btf.c:37:21: error: no member named 'cpu' in 'struct rq'
> >                     out__rq_cpu = rq->cpu;
> >                                   ~~  ^
> >     progs/test_ksyms_btf.c:44:27: error: no member named 'cpu' in 'struct rq'
> >                     out__cpu_0_rq_cpu = rq->cpu;
> >                                         ~~  ^
> >     progs/test_ksyms_btf.c:48:25: error: no member named 'cpu' in 'struct rq'
> >             out__this_rq_cpu = rq->cpu;
> >                                ~~  ^
> >     3 errors generated.
> > --
> > > > progs/test_ksyms_btf_null_check.c:25:26: error: no member named 'cpu' in 'struct rq'
> >                     *(volatile int *)(&rq->cpu);
> >                                        ~~  ^
> >     1 error generated.
> > --
> > > > progs/test_ksyms_weak.c:41:29: error: no member named 'cpu' in 'struct rq'
> >                     out__existing_typed = rq->cpu;
> >                                           ~~  ^
> >     1 error generated.
>
> I tried to reproduce this, without success. And it's not really clear to me
> how it could be related to the change either...

Hi Andres,

Sorry for the inconvenience, this error can be reproduced by `make
O=/tmp/kselftest -C tools/testing/selftests/bpf`, but it shouldn't be
related to your commit, the build of parent commit stopped in early
stage which caused the false positive.

Best Regards,
Rong Chen

> Greetings,
>
> Andres Freund