netdev - Re: [PATCH v2 bpf] libbpf: fix missing _

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Date:   Fri, 26 Jul 2019 16:01:10 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andriin@...com>, bpf <bpf@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH v2 bpf] libbpf: fix missing __WORDSIZE definition

On Fri, Jul 26, 2019 at 1:49 PM Arnaldo Carvalho de Melo
<arnaldo.melo@...il.com> wrote:
>
> Em Thu, Jul 18, 2019 at 10:30:21AM -0700, Andrii Nakryiko escreveu:
> > hashmap.h depends on __WORDSIZE being defined. It is defined by
> > glibc/musl in different headers. It's an explicit goal for musl to be
> > "non-detectable" at compilation time, so instead include glibc header if
> > glibc is explicitly detected and fall back to musl header otherwise.
> >
> > Fixes: e3b924224028 ("libbpf: add resizable non-thread safe internal hashmap")
> > Reported-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> > Signed-off-by: Andrii Nakryiko <andriin@...com>
>
> Couldn't find ths in the bpf tree, please consider applying it:
>
> Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>

Arnaldo, I somehow got impression that you were going to pull this
into your perf tree. Can you please confirm that it wasn't pulled into
your tree, so that Alexei can apply it to bpf tree? Thanks!


>
>
> - Arnaldo
>
> > ---
> >  tools/lib/bpf/hashmap.h | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/tools/lib/bpf/hashmap.h b/tools/lib/bpf/hashmap.h
> > index 03748a742146..bae8879cdf58 100644
> > --- a/tools/lib/bpf/hashmap.h
> > +++ b/tools/lib/bpf/hashmap.h
> > @@ -10,6 +10,11 @@
> >
> >  #include <stdbool.h>
> >  #include <stddef.h>
> > +#ifdef __GLIBC__
> > +#include <bits/wordsize.h>
> > +#else
> > +#include <bits/reg.h>
> > +#endif
> >  #include "libbpf_internal.h"
> >
> >  static inline size_t hash_bits(size_t h, int bits)
> > --
> > 2.17.1
>
> --
>
> - Arnaldo