Re: [PATCH] selftests: fix bpf build/test workflow regression when KBUILD_OUTPUT is set

[Alexei Starovoitov]

On Fri, May 10, 2019 at 08:52:49PM -0600, Shuah Khan wrote:
> commit 8ce72dc32578 ("selftests: fix headers_install circular dependency")
> broke bpf build/test workflow. When KBUILD_OUTPUT is set, bpf objects end
> up in KBUILD_OUTPUT build directory instead of in ../selftests/bpf.
> 
> The following bpf workflow breaks when it can't find the test_verifier:
> 
> cd tools/testing/selftests/bpf; make; ./test_verifier;
> 
> Fix it to set OUTPUT only when it is undefined in lib.mk. It didn't need
> to be set in the first place.
> 
> Fixes: commit 8ce72dc32578 ("selftests: fix headers_install circular dependency")
> 
> Reported-by: Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>
> Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>

'git am' couldn't apply this patch because "sha1 information is lacking",
but the patch itself looks good.
Acked-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Thanks for the quick fix.