linux-kernel - RE: [PATCH 2/4] x86: convert threshold_bank.cpus from atomic_t to refcount

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Message-ID: <2236FBA76BA1254E88B949DDB74E612B41C4D921@IRSMSX102.ger.corp.intel.com>
Date:   Mon, 20 Feb 2017 12:20:04 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "hpa@...or.com" <hpa@...or.com>,
        Hans Liljestrand <ishkamiel@...il.com>,
        Kees Cook <keescook@...omium.org>,
        David Windsor <dwindsor@...il.com>
Subject: RE: [PATCH 2/4] x86: convert threshold_bank.cpus from atomic_t to
 refcount_t


> On Mon, Feb 20, 2017 at 01:06:19PM +0200, Elena Reshetova wrote:
> > refcount_t type and corresponding API should be
> > used instead of atomic_t when the variable is used as
> > a reference counter. This allows to avoid accidental
> > refcounter overflows that might lead to use-after-free
> > situations.
> >
> > Signed-off-by: Elena Reshetova <elena.reshetova@...el.com>
> > Signed-off-by: Hans Liljestrand <ishkamiel@...il.com>
> > Signed-off-by: Kees Cook <keescook@...omium.org>
> > Signed-off-by: David Windsor <dwindsor@...il.com>
> 
> That SOB chain tells me that you wrote the patch and Hans, Kees and
> David handled it in some way and the last one - David - is sending it to
> me. It doesn't look like that though.
> 
> So what are you trying to express with it?

Whole refcount conversion was a long piece of work and the above people contributed to this code either as
writes or reviewers or both.  I am primary writer of the code and I am handing patches in our tree and sending them out, 
so how exactly the above should look like? 

Please note that we have about 300 patches and if I have to modify each sign-off to
reflect who contributed to each commit in what particular way, I will go insane.  

Best Regards,
Elena.