linux-kernel - Re: [PATCH net-next v2 2/3] r8152: clear the flagofSCHEDULE

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Message-ID: <20141102225307.GA19900@electric-eye.fr.zoreil.com>
Date:	Sun, 2 Nov 2014 23:53:07 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Hayes Wang <hayeswang@...ltek.com>
Cc:	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	nic_swsd <nic_swsd@...ltek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>
Subject: Re: [PATCH net-next v2 2/3] r8152: clear the flagofSCHEDULE_TASKLET
 in tasklet

Hayes Wang <hayeswang@...ltek.com> :
>  David Miller [davem@...emloft.net]
[...]
> > If another thread of control sets the bit between the test and the
> > clear, you will lose an event.
> 
> It is fine. The flag is used to schedule a tasklet, so if the tasklet is
> starting running, all the other plans for scheduling a tasklet could
> be cleared.

test_and_clear_bit (dense) or clear_bit would be more idiomatic.

-- 
Ueimor
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