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[bpf-next,v3,03/11] selftests: Pass VMLINUX_BTF to runqslower Makefile

Message ID 157918093501.1357254.2594464485570114583.stgit@toke.dk (mailing list archive)
State Superseded
Headers show
Series tools: Use consistent libbpf include paths everywhere | expand

Commit Message

Toke Høiland-Jørgensen Jan. 16, 2020, 1:22 p.m. UTC 
From: Toke Høiland-Jørgensen <toke@redhat.com>

Add a VMLINUX_BTF variable with the locally-built path when calling the
runqslower Makefile from selftests. This makes sure a simple 'make'
invocation in the selftests dir works even when there is no BTF information
for the running kernel. Because of the previous changes to the runqslower
Makefile, if no locally-built vmlinux file exists, the wildcard search will
fall back to the pre-defined paths (and error out if they don't exist).

Fixes: 3a0d3092a4ed ("selftests/bpf: Build runqslower from selftests")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
---
 tools/testing/selftests/bpf/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Andrii Nakryiko Jan. 16, 2020, 6:56 p.m. UTC | #1 
On Thu, Jan 16, 2020 at 5:22 AM Toke Høiland-Jørgensen <toke@redhat.com> wrote:
>
> From: Toke Høiland-Jørgensen <toke@redhat.com>
>
> Add a VMLINUX_BTF variable with the locally-built path when calling the
> runqslower Makefile from selftests. This makes sure a simple 'make'
> invocation in the selftests dir works even when there is no BTF information
> for the running kernel. Because of the previous changes to the runqslower
> Makefile, if no locally-built vmlinux file exists, the wildcard search will
> fall back to the pre-defined paths (and error out if they don't exist).
>
> Fixes: 3a0d3092a4ed ("selftests/bpf: Build runqslower from selftests")
> Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
> ---
>  tools/testing/selftests/bpf/Makefile |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> index 246d09ffb296..30d0e7a813d2 100644
> --- a/tools/testing/selftests/bpf/Makefile
> +++ b/tools/testing/selftests/bpf/Makefile
> @@ -127,7 +127,7 @@ $(OUTPUT)/test_stub.o: test_stub.c
>  .PHONY: $(OUTPUT)/runqslower
>  $(OUTPUT)/runqslower: force
>         $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower           \
> -                   OUTPUT=$(CURDIR)/tools/
> +                   OUTPUT=$(CURDIR)/tools/ VMLINUX_BTF=$(abspath ../../../../vmlinux)

we can do "first match" wildcard trick here instead

>
>  BPFOBJ := $(OUTPUT)/libbpf.a
>
>
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Patch

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 246d09ffb296..30d0e7a813d2 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -127,7 +127,7 @@  $(OUTPUT)/test_stub.o: test_stub.c
 .PHONY: $(OUTPUT)/runqslower
 $(OUTPUT)/runqslower: force
 	$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/runqslower	      \
-		    OUTPUT=$(CURDIR)/tools/
+		    OUTPUT=$(CURDIR)/tools/ VMLINUX_BTF=$(abspath ../../../../vmlinux)
 
 BPFOBJ := $(OUTPUT)/libbpf.a