From: Stephen Hemminger <stephen@networkplumber.org>
To: Xiao Wang <xiao.w.wang@intel.com>
Cc: ferruh.yigit@intel.com, dev@dpdk.org
Subject: Re: [PATCH v2] igb_uio: allow multi-process access
Date: Tue, 19 Dec 2017 07:39:01 -0800 [thread overview]
Message-ID: <20171219073901.6d048a47@xeon-e3> (raw)
In-Reply-To: <1513698140-92837-1-git-send-email-xiao.w.wang@intel.com>
On Tue, 19 Dec 2017 07:42:20 -0800
Xiao Wang <xiao.w.wang@intel.com> wrote:
> + atomic_dec(&udev->refcnt);
> + if (atomic_read(&udev->refcnt) > 0)
> + return 0;
> +
The point of using atomic functions is to do atomic operations.
You need to use atomic_dec_and_test here.
next prev parent reply other threads:[~2017-12-19 15:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-09 1:57 [PATCH] igb_uio: allow multi-process access Xiao Wang
2017-12-12 1:38 ` Stephen Hemminger
2017-12-18 15:53 ` Wang, Xiao W
2017-12-19 15:42 ` [PATCH v2] " Xiao Wang
2017-12-19 9:04 ` Tiwei Bie
2017-12-19 9:23 ` Wang, Xiao W
2017-12-19 15:39 ` Stephen Hemminger [this message]
2017-12-19 17:58 ` [PATCH v3] " Xiao Wang
2017-12-20 2:17 ` Tiwei Bie
2018-01-01 22:00 ` [PATCH v4] " Xiao Wang
2018-01-16 19:43 ` Ferruh Yigit
2018-01-16 23:37 ` Thomas Monjalon
2018-03-08 21:17 ` [PATCH] " Stephen Hemminger
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