Message-ID: <3E651456.1050808@colorfullife.com>
Date: Tue, 04 Mar 2003 22:02:14 +0100
From: Manfred Spraul <manfred@colorfullife.com>
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CC: linux-kernel@vger.kernel.org
Subject: Re: kill_fasync usage
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SA wrote:

>I wnat to use kill_fasync(struct fasync_struct *PTR,...) to notify userland of 
>events.  Can I just call kill_fasync regardless of the state of PTR or does 
>PTR actually have to point to something valid.  
>  
>
kill_fasync receives the _address_ of the variable that contains the 
list of processes that need notifications. It must not be NULL. (I 
assume you look at 2.4 or 2.5 - 2.2 had a different interface)

Check linux/drivers/char/busmouse.c for an example, the interface is 
simple: call fasync_helper to register and kill_fasync for the actual 
notification.

--
    Manfred

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