netdev - Re: [net-next:master 98/98] drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20121130135356.41a0f855@nehalam.linuxnetplumber.net>
Date:	Fri, 30 Nov 2012 13:53:56 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Andrew Gallatin <gallatin@...i.com>
Cc:	kbuild test robot <fengguang.wu@...el.com>, netdev@...r.kernel.org
Subject: Re: [net-next:master 98/98]
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to
 restricted __be16

On Fri, 30 Nov 2012 16:51:41 -0500
Andrew Gallatin <gallatin@...i.com> wrote:

> On 11/30/12 16:02, kbuild test robot wrote:
> > tree:   git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
> > head:   1b4c44e6369dbbafd113f1e00b406f1eda5ab5b2
> > commit: 1b4c44e6369dbbafd113f1e00b406f1eda5ab5b2 [98/98] myri10ge: Add vlan rx for better GRO perf.
> > 
> > 
> > sparse warnings:
> > 
> > + drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted __be16
> > + drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted __be16
> > + drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted __be16
> > + drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted __be16
> > + drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:16: sparse: restricted __be16 degrades to integer
> 
> 
> OK, maybe a dumb question again, but how do I get sparse to produce
> the 'cast to restricted' warnings?  I ran sparse before submission,
> but it only showed the pre-existing, non "cast to restricted"
> warnings, so I did not know I was introducing a new warning.
> Do I need to use a different architecture? (I was using x86_64).

See Documentation/sparse.txt
  
  The optional make variable CF can be used to pass arguments to sparse.  The
  build system passes -Wbitwise to sparse automatically.  To perform endianness
  checks, you may define __CHECK_ENDIAN__:

        make C=2 CF="-D__CHECK_ENDIAN__"

  These checks are disabled by default as they generate a host of warnings.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html