netdev - Re: [PATCH] net: Add napi_sycnhronize() to sync with napi poll

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Message-Id: <1192664183.13993.30.camel@localhost.localdomain>
Date:	Wed, 17 Oct 2007 18:36:23 -0500
From:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
To:	benh@...nel.crashing.org
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	netdev@...r.kernel.org, Roland Dreier <rdreier@...co.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jeff Garzik <jeff@...zik.org>,
	linuxppc-dev list <linuxppc-dev@...abs.org>
Subject: Re: [PATCH] net: Add napi_sycnhronize() to sync with napi poll

On Thu, 2007-10-18 at 08:04 +1000, Benjamin Herrenschmidt wrote:
> net: Add __napi_synchronize() to sync with napi poll
> 
> The EMAC driver which needs to handle multiple devices with one
> NAPI instance implements its own per-channel disable bit. However,
> when setting such a bit, it needs to synchronize with the poller
> (that is make sure that any pending poller instance has completed,
> or is started late enough to see that disable bit).
> 
> This implements a low level __napi_synchronize() function to acheive
> that. The underscores are to emphasis the low level aspect of it and
> to discourage driver writers who don't know what they are doing to
> use it (to please DaveM :-)

Erm.. your commit log calls it __napi_synchronize still.

josh

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