netdev - Re: [PATCH bpf-next] selftests/bpf: fix compilation error in progs/profiler.inc.h

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Date:   Thu, 15 Oct 2020 05:50:34 +0000
From:   Song Liu <songliubraving@...com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
CC:     Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, Kernel Team <Kernel-team@...com>,
        Alexei Starovoitov <ast@...nel.org>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...omium.org" <kpsingh@...omium.org>
Subject: Re: [PATCH bpf-next] selftests/bpf: fix compilation error in
 progs/profiler.inc.h



> On Oct 14, 2020, at 9:29 PM, Alexei Starovoitov <alexei.starovoitov@...il.com> wrote:
> 
> On Tue, Oct 13, 2020 at 09:36:38PM -0700, Song Liu wrote:
>> Fix the following error when compiling selftests/bpf
>> 
>> progs/profiler.inc.h:246:5: error: redefinition of 'pids_cgrp_id' as different kind of symbol
>> 
>> pids_cgrp_id is used in cgroup code, and included in vmlinux.h. Fix the
>> error by renaming pids_cgrp_id as pids_cgroup_id.
>> 
>> Fixes: 03d4d13fab3f ("selftests/bpf: Add profiler test")
>> Signed-off-by: Song Liu <songliubraving@...com>
>> ---
>> tools/testing/selftests/bpf/progs/profiler.inc.h | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>> 
>> diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h
>> index 00578311a4233..b554c1e40b9fb 100644
>> --- a/tools/testing/selftests/bpf/progs/profiler.inc.h
>> +++ b/tools/testing/selftests/bpf/progs/profiler.inc.h
>> @@ -243,7 +243,7 @@ static ino_t get_inode_from_kernfs(struct kernfs_node* node)
>> 	}
>> }
>> 
>> -int pids_cgrp_id = 1;
>> +int pids_cgroup_id = 1;
> 
> I would prefer to try one of three options that Andrii suggested.

Ah, I missed that email (because of vger lag, I guess). Just verified 
Andrii's version works. 

Thanks,
Song