linux-kernel - Re: [PATCH] kernfs: remove outdated and confusing comment

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Date:	Wed, 11 Mar 2015 07:45:31 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-kernel@...r.kernel.org, linux-sh@...r.kernel.org
Subject: Re: [PATCH] kernfs: remove outdated and confusing comment

On Wed, Mar 11, 2015 at 11:26:02AM +0100, Wolfram Sang wrote:
> From: Wolfram Sang <wsa+renesas@...g-engineering.com>
> 
> Grabbing the parent is not happening anymore since 2010 (e72ceb8ccac5f7
> "sysfs: Remove sysfs_get/put_active_two"). Remove this confusing
> comment.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>

Acked-by: Tejun Heo <tj@...nel.org>

> Found while trying to find out why my sysfs-bin file always returns POLLPRI
> after opening, reading, polling. Any pointers while I am here? :)

Hmm... poll isn't hooked up for bin files and the behavior isn't well
defined either.  The open file's event counter is never synchronized
to the backing node's.  Before the first kernfs_notify(), it won't
trigger and after always.  We'll prolly need to define that better.
What's the use case that you're interested in?

Thanks.

-- 
tejun
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