Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
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  authenticity information available from domain of
  roger.pau@citrix.com) identity=pra; client-ip=162.221.158.21;
  receiver=esa5.hc3370-68.iphmx.com;
  envelope-from="roger.pau@citrix.com";
  x-sender="roger.pau@citrix.com";
  x-conformance=sidf_compatible
Received-SPF: Pass (esa5.hc3370-68.iphmx.com: domain of
  roger.pau@citrix.com designates 162.221.158.21 as permitted
  sender) identity=mailfrom; client-ip=162.221.158.21;
  receiver=esa5.hc3370-68.iphmx.com;
  envelope-from="roger.pau@citrix.com";
  x-sender="roger.pau@citrix.com";
  x-conformance=sidf_compatible; x-record-type="v=spf1";
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  ip4:195.66.111.40/30 ip4:85.115.9.32/28 ip4:199.102.83.4
  ip4:192.28.146.160 ip4:192.28.146.107 ip4:216.52.6.88
  ip4:216.52.6.188 ip4:162.221.158.21 ip4:162.221.156.83 ~all"
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  authenticity information available from domain of
  postmaster@mail.citrix.com) identity=helo;
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  envelope-from="roger.pau@citrix.com";
  x-sender="postmaster@mail.citrix.com";
  x-conformance=sidf_compatible
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Date:   Tue, 13 Aug 2019 10:20:00 +0200
From:   Roger Pau =?utf-8?B?TW9ubsOp?= <roger.pau@citrix.com>
To:     Chuhong Yuan <hslester96@gmail.com>
CC:     Jens Axboe <axboe@kernel.dk>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        <linux-kernel@vger.kernel.org>, <linux-block@vger.kernel.org>,
        <xen-devel@lists.xenproject.org>
Subject: Re: [Xen-devel] [PATCH v2 3/3] xen/blkback: Use refcount_t for
 refcount
Message-ID: <20190813082000.shprs2ci33v5eapd@Air-de-Roger>
References: <20190813061650.5483-1-hslester96@gmail.com>
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On Tue, Aug 13, 2019 at 02:16:50PM +0800, Chuhong Yuan wrote:
> Reference counters are preferred to use refcount_t instead of
> atomic_t.
> This is because the implementation of refcount_t can prevent
> overflows and detect possible use-after-free.
> So convert atomic_t ref counters to refcount_t.
> 
> Signed-off-by: Chuhong Yuan <hslester96@gmail.com>

Acked-by: Roger Pau Monn? <roger.pau@citrix.com>

Thanks, Roger.