Date: Fri, 13 Jan 2017 11:46:27 +0100 From: Vincenzo Maffione <v.maffione@gmail.com> To: "Ngie Cooper (yaneurabeya)" <yaneurabeya@gmail.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, freebsd-powerpc@freebsd.org, FreeBSD CURRENT <freebsd-current@freebsd.org>, Luigi Rizzo <rizzo@iet.unipi.it> Subject: Re: powerpc.LINT* broken in netmap(4) Message-ID: <CA%2B_eA9jzSn-oojzH4AizXa34TjxwwHjv9ZUZuY9BnK3N1L9fXw@mail.gmail.com> In-Reply-To: <D636872E-F5E0-49D4-A27E-621322BAE2CC@gmail.com> References: <D636872E-F5E0-49D4-A27E-621322BAE2CC@gmail.com>
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Hi,
Thanks for reporting. The warning is innocuous, but I'm not sure how to
silence it. Maybe
diff --git a/sys/dev/netmap/netmap_generic.c
b/sys/dev/netmap/netmap_generic.c
index cb1cff1f0e7..226a0864fd0 100644
--- a/sys/dev/netmap/netmap_generic.c
+++ b/sys/dev/netmap/netmap_generic.c
@@ -168,7 +168,7 @@ nm_os_get_mbuf(struct ifnet *ifp, int len)
static void void_mbuf_dtor(struct mbuf *m, void *arg1, void *arg2) { }
#define SET_MBUF_DESTRUCTOR(m, fn) do { \
- (m)->m_ext.ext_free =3D fn ? (void *)fn : (void *)void_mbuf_dtor; \
+ (m)->m_ext.ext_free =3D (fn !=3D NULL) ? (void *)fn : (void
*)void_mbuf_dtor; \
} while (0)
static inline struct mbuf *
or we could turn SET_MBUF_DESTRUCTOR into a real function.
Cheers,
VIncenzo
2017-01-13 11:22 GMT+01:00 Ngie Cooper (yaneurabeya) <yaneurabeya@gmail.com=
>
:
> Hi,
> I spotted these compilation errors on universe12a.freebsd.org for
> both powerpc.LINT and powerpc.LINT64:
>
> cc1: warnings being treated as errors
> /scratch/tmp/ngie/svn/sys/dev/netmap/netmap_generic.c: In function
> 'generic_set_tx_event':
> /scratch/tmp/ngie/svn/sys/dev/netmap/netmap_generic.c:765: warning: the
> address of 'generic_mbuf_destructor' will always evaluate as 'true'
> [-Waddress]
> --- netmap_generic.o ---
> *** [netmap_generic.o] Error code 1
>
> I haven=E2=80=99t yet dug into why this only surfaces on powerpc,=
yet=E2=80=A6
> Thanks,
> -Ngie
>
--=20
Vincenzo Maffione
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