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Message-ID: <CAJ+HfNh+2oN_A4KtUkeSfvH+D6AHkVWErskq5+s2zgejot0BiA@mail.gmail.com>
Date: Sat, 28 Sep 2024 11:14:01 +0200
From: Björn Töpel <bjorn@...nel.org>
To: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: Andrii Nakryiko <andrii@...nel.org>, Eduard Zingerman <eddyz87@...il.com>, 
	Mykola Lysenko <mykolal@...com>, bpf@...r.kernel.org, netdev@...r.kernel.org, 
	Björn Töpel <bjorn@...osinc.com>, 
	linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, Charlie Jenkins <charlie@...osinc.com>
Subject: Re: [PATCH bpf-next 2/2] selftests: bpf: Add missing per-arch include path

On Fri, 27 Sept 2024 at 22:52, Andrii Nakryiko
<andrii.nakryiko@...il.com> wrote:
>
> On Fri, Sep 27, 2024 at 6:14 AM Björn Töpel <bjorn@...nel.org> wrote:
> >
> > From: Björn Töpel <bjorn@...osinc.com>
> >
> > The prog_tests programs do not include the per-arch tools include
> > path, e.g. tools/arch/riscv/include. Some architectures depend those
> > files to build properly.
> >
> > Include tools/arch/$(SUBARCH)/include in the selftests bpf build.
> >
> > Fixes: 6d74d178fe6e ("tools: Add riscv barrier implementation")
> > Signed-off-by: Björn Töpel <bjorn@...osinc.com>
> > ---
> >  tools/testing/selftests/bpf/Makefile | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
> > index 365740f24d2e..d6a53afa449f 100644
> > --- a/tools/testing/selftests/bpf/Makefile
> > +++ b/tools/testing/selftests/bpf/Makefile
> > @@ -10,6 +10,7 @@ TOOLSDIR := $(abspath ../../..)
> >  LIBDIR := $(TOOLSDIR)/lib
> >  BPFDIR := $(LIBDIR)/bpf
> >  TOOLSINCDIR := $(TOOLSDIR)/include
> > +TOOLSARCHINCDIR := $(TOOLSDIR)/arch/$(SRCARCH)/include
> >  BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
> >  APIDIR := $(TOOLSINCDIR)/uapi
> >  ifneq ($(O),)
> > @@ -44,7 +45,7 @@ CFLAGS += -g $(OPT_FLAGS) -rdynamic                                   \
> >           -Wall -Werror -fno-omit-frame-pointer                         \
> >           $(GENFLAGS) $(SAN_CFLAGS) $(LIBELF_CFLAGS)                    \
> >           -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)          \
> > -         -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT)
> > +         -I$(TOOLSINCDIR) -I$(TOOLSARCHINCDIR) -I$(APIDIR) -I$(OUTPUT)
>
> Eduard was going to switch selftests to use kernel UAPI headers, I
> wonder if we should do just that and then set up arch-specific
> includes from kernel (not from tools/) as well?

In the end it's up to you guys! This is broken on Linus' master for
RISC-V now, so from my (RISC-V) perspective having a workaround sooner
than later would be nice!

@Eduard Do you have any patches around? If so, I can take them for a spin on RV.


Björn

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