From: "Bowers, AndrewX" <andrewx.bowers@intel.com>
To: unlisted-recipients:; (no To-header on input)
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"intel-wired-lan@lists.osuosl.org"
<intel-wired-lan@lists.osuosl.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH] virtchnl: Add missing explicit padding to structures
Date: Wed, 22 Apr 2020 18:50:26 +0000 [thread overview]
Message-ID: <1e732391d4e94bbc87ab01ee80934fd3@intel.com> (raw)
In-Reply-To: <20200416095049.12917-1-geert@linux-m68k.org>
-----Original Message-----
From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf Of Geert Uytterhoeven
Sent: Thursday, April 16, 2020 2:51 AM
To: Kirsher, Jeffrey T <jeffrey.t.kirsher@intel.com>; David S . Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-kernel@vger.kernel.org; Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [Intel-wired-lan] [PATCH] virtchnl: Add missing explicit padding to structures
On e.g. m68k, the alignment of 32-bit values is only 2 bytes, leading
to:
./include/linux/avf/virtchnl.h:147:36: warning: division by zero [-Wdiv-by-zero]
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:577:1: note: in expansion of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);
^~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:577:32: error: enumerator value for ‘virtchnl_static_assert_virtchnl_filter’ is not an integer constant
VIRTCHNL_CHECK_STRUCT_LEN(272, virtchnl_filter);
^~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:147:53: note: in definition of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:147:36: warning: division by zero [-Wdiv-by-zero]
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:619:1: note: in expansion of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);
^~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:619:31: error: enumerator value for ‘virtchnl_static_assert_virtchnl_pf_event’ is not an integer constant
VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_pf_event);
^~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:147:53: note: in definition of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:147:36: warning: division by zero [-Wdiv-by-zero]
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:640:1: note: in expansion of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info);
^~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:640:31: error: enumerator value for ‘virtchnl_static_assert_virtchnl_iwarp_qv_info’ is not an integer constant
VIRTCHNL_CHECK_STRUCT_LEN(12, virtchnl_iwarp_qv_info);
^~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:147:53: note: in definition of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:147:36: warning: division by zero [-Wdiv-by-zero]
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
./include/linux/avf/virtchnl.h:647:1: note: in expansion of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info);
^~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:647:31: error: enumerator value for ‘virtchnl_static_assert_virtchnl_iwarp_qvlist_info’ is not an integer constant
VIRTCHNL_CHECK_STRUCT_LEN(16, virtchnl_iwarp_qvlist_info);
^~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/avf/virtchnl.h:147:53: note: in definition of macro ‘VIRTCHNL_CHECK_STRUCT_LEN’
{ virtchnl_static_assert_##X = (n)/((sizeof(struct X) == (n)) ? 1 : 0) }
^
Fix this by adding explicit padding to structures with holes.
Reported-by: noreply@ellerman.id.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
Exposed by the "select PCI" in commit 4be5e8648b0c287a ("media: move CEC platform drivers to a separate directory").
---
include/linux/avf/virtchnl.h | 5 +++++
1 file changed, 5 insertions(+)
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
prev parent reply other threads:[~2020-04-22 18:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-16 9:50 [PATCH] virtchnl: Add missing explicit padding to structures Geert Uytterhoeven
2020-04-22 18:50 ` Bowers, AndrewX [this message]
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