From: Fengguang Wu <fengguang.wu@intel.com>
To: "Rafał Miłecki" <zajec5@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>,
kbuild-all@01.org, Christopher Li <sparse@chrisli.org>,
Linux-Sparse <linux-sparse@vger.kernel.org>
Subject: Re: [wireless-next:master 70/102] drivers/net/wireless/b43/phy_ht.c:338:35: sparse: cast truncates bits from constant value (ffff3fff becomes 3fff)
Date: Tue, 16 Sep 2014 10:17:18 +0800 [thread overview]
Message-ID: <20140916021718.GB16455@localhost> (raw)
In-Reply-To: <CACna6ryGg4NY2ecDjCKckXk8QXSJWVpbWWtdya9JRB618G92wQ@mail.gmail.com>
I could disable this warning in my reports, but CC sparse authors
first to check if there are more elegant solutions.
On Mon, Sep 15, 2014 at 11:16:09PM +0200, Rafał Miłecki wrote:
> On 15 September 2014 21:50, kbuild test robot <fengguang.wu@intel.com> wrote:
> > tree: git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next.git master
> > head: 1030f9fe65602465a89beaa05c3343cf9fd68a88
> > commit: 1f21de53ac8651b1a3e79576f1adf00aabecd052 [70/102] b43: HT-PHY: Implement band switching
> > reproduce:
> > # apt-get install sparse
> > git checkout 1f21de53ac8651b1a3e79576f1adf00aabecd052
> > make ARCH=x86_64 allmodconfig
> > make C=1 CF=-D__CHECK_ENDIAN__
> >
> >
> > sparse warnings: (new ones prefixed by >>)
> >
> >>> drivers/net/wireless/b43/phy_ht.c:338:35: sparse: cast truncates bits from constant value (ffff3fff becomes 3fff)
> >
> > vim +338 drivers/net/wireless/b43/phy_ht.c
>
> I already got the same sparse warning twice (for different parts of code):
>
> Message-ID: <53b5ab1e.Y9bKd3t4DteE6Pzc%fengguang.wu@intel.com>
> [wireless-next:master 163/164]
> drivers/net/wireless/b43/phy_n.c:5671:55: sparse: cast truncates bits
> from constant value (ffff7fff becomes 7fff)
>
> Message-ID: <53c97150.9C2t3ebOTkndUZD5%fengguang.wu@intel.com>
> [wireless-next:master 70/75] drivers/net/wireless/b43/phy_n.c:6077:35:
> sparse: cast truncates bits from constant value (ffff3fff becomes
> 3fff)
>
> In both of them I pointed that this is an expected behavior. No other
> solution was proposed.
>
> Can this test be fixed or disabled?
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next parent reply other threads:[~2014-09-16 2:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <541742fe.FxHiltLcSOUDGDDj%fengguang.wu@intel.com>
[not found] ` <CACna6ryGg4NY2ecDjCKckXk8QXSJWVpbWWtdya9JRB618G92wQ@mail.gmail.com>
2014-09-16 2:17 ` Fengguang Wu [this message]
2014-09-16 7:20 ` [wireless-next:master 70/102] drivers/net/wireless/b43/phy_ht.c:338:35: sparse: cast truncates bits from constant value (ffff3fff becomes 3fff) Dan Carpenter
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