linux-kernel - Re: [PATCH] sysfs: add filter function to groups

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Date:	Mon, 29 Oct 2007 18:27:24 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	James Bottomley <James.Bottomley@...elEye.com>
Cc:	Greg KH <greg@...ah.com>, linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sysfs: add filter function to groups

On Mon, 2007-10-29 at 11:57 -0500, James Bottomley wrote:
> On Mon, 2007-10-29 at 17:54 +0100, Kay Sievers wrote:
> > On Mon, 2007-10-29 at 10:16 -0500, James Bottomley wrote:

> > >  struct attribute_group {
> > >  	const char		*name;
> > > +	int			(*filter_show)(struct kobject *, int);
> > 
> > Are you sure that you want to return an array index here, instead of the
> > actual attribute? Like:
> 
> Actually, it returns a true/false value indicating whether the given
> attribute should be displayed.

It isn't about the return value of the function, that's fine. You call
back with the index number (int) of the array of attributes, instead of
passing the attribute pointer (struct attribute *attr) back to ask the
device for the attribute to create.

Kay

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