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

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

[Shuah Khan]

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@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/testing/selftests/lib.mk | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 098dd0065fb1..077337195783 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -3,15 +3,9 @@
 CC := $(CROSS_COMPILE)gcc
 
 ifeq (0,$(MAKELEVEL))
-    ifneq ($(O),)
-	OUTPUT := $(O)
-    else
-	ifneq ($(KBUILD_OUTPUT),)
-		OUTPUT := $(KBUILD_OUTPUT)
-	else
-		OUTPUT := $(shell pwd)
-		DEFAULT_INSTALL_HDR_PATH := 1
-	endif
+    ifeq ($(OUTPUT),)
+	OUTPUT := $(shell pwd)
+	DEFAULT_INSTALL_HDR_PATH := 1
     endif
 endif
 selfdir = $(realpath $(dir $(filter %/lib.mk,$(MAKEFILE_LIST))))
-- 
2.17.1

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@gmail.com>
> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

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

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

[Alexei Starovoitov]

On Fri, May 10, 2019 at 9:37 PM Alexei Starovoitov
<alexei.starovoitov@gmail.com> wrote:
>
> 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@gmail.com>
> > Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
>
> 'git am' couldn't apply this patch because "sha1 information is lacking",
> but the patch itself looks good.
> Acked-by: Alexei Starovoitov <ast@kernel.org>
> Thanks for the quick fix.

Ping! What is the status of the fix?

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

[Shuah Khan]

On 5/16/19 12:36 PM, Alexei Starovoitov wrote:
> On Fri, May 10, 2019 at 9:37 PM Alexei Starovoitov
> <alexei.starovoitov@gmail.com> wrote:
>>
>> 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@gmail.com>
>>> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
>>
>> 'git am' couldn't apply this patch because "sha1 information is lacking",
>> but the patch itself looks good.
>> Acked-by: Alexei Starovoitov <ast@kernel.org>
>> Thanks for the quick fix.
> 
> Ping! What is the status of the fix?
> 

Sending pull request this afternoon.

thanks,
-- Shuah