linux-kernel - Re: [PATCH 4/9] Correcting truncation error for constant HV_CRASH_CTL_CRASH

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Date:	Wed, 18 Mar 2015 15:26:15 +0100
From:	Greg KH <gregkh@...uxfoundation.org>
To:	KY Srinivasan <kys@...rosoft.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"vkuznets@...hat.com" <vkuznets@...hat.com>,
	Nick Meier <Nick.Meier@...rosoft.com>
Subject: Re: [PATCH 4/9] Correcting truncation error for constant
 HV_CRASH_CTL_CRASH_NOTIFY

On Wed, Mar 18, 2015 at 02:23:09PM +0000, KY Srinivasan wrote:
> 
> 
> > -----Original Message-----
> > From: Greg KH [mailto:gregkh@...uxfoundation.org]
> > Sent: Wednesday, March 18, 2015 12:27 AM
> > To: KY Srinivasan
> > Cc: linux-kernel@...r.kernel.org; devel@...uxdriverproject.org;
> > olaf@...fle.de; apw@...onical.com; vkuznets@...hat.com; Nick Meier
> > Subject: Re: [PATCH 4/9] Correcting truncation error for constant
> > HV_CRASH_CTL_CRASH_NOTIFY
> > 
> > On Tue, Mar 17, 2015 at 05:41:56PM -0700, K. Y. Srinivasan wrote:
> > > From: Nick Meier <nmeier@...rosoft.com>
> > >
> > > HV_CRASH_CTL_CRASH_NOTIFY is a 64 bit number.  Depending on the
> > usage context,
> > > the value may be truncated. This patch is in response from the following
> > > email from Intel:
> > 
> > "from Intel:" is really vague, please be nice and report who told you
> > about this problem.
> > 
> > >
> > >     [char-misc:char-misc-testing 25/45] drivers/hv/vmbus_drv.c:67:9: sparse:
> > >                    constant 0x8000000000000000 is so big it is unsigned long
> > >
> > >     tree:   git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
> > char-misc-testing
> > >     head:   b3de8e3719e582f3182bb504295e4a8e43c8c96f
> > >     commit: 96c1d0581d00f7abe033350edb021a9d947d8d81 [25/45] Drivers:
> > hv: vmbus: Add support for VMBus panic notifier handler
> > >     reproduce:
> > >       # apt-get install sparse
> > >       git checkout 96c1d0581d00f7abe033350edb021a9d947d8d81
> > >       make ARCH=x86_64 allmodconfig
> > >       make C=1 CF=-D__CHECK_ENDIAN__
> > >
> > >     sparse warnings: (new ones prefixed by >>)
> > >
> > >     drivers/hv/vmbus_drv.c:67:9: sparse: constant 0x8000000000000000 is so
> > big it is unsigned long
> > >     ...
> > >
> > > The current char-next branch is broken and this patch fixes
> > > the bug.
> > >
> > > Signed-off-by: Nick Meier <nmeier@...rosoft.com>
> > > Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> > 
> > You forgot a "Reported-by:" here.
> 
> Greg,
> 
> Should I resend the set with corrections to this patch.

Why wouldn't you?
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