lkml.org 
[lkml]   [2004]   [Aug]   [20]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateFri, 20 Aug 2004 14:45:25 -0500
FromDave C Boutcher <>
SubjectRe: VPD in sysfs
On Fri, Aug 20, 2004 at 03:21:43PM +0100, Matthew Wilcox wrote:
> On Sat, Aug 14, 2004 at 07:29:32PM +0100, Matthew Wilcox wrote:
> > Thoughts?  Since there's at least four and probably more ways of getting
> > at VPD, we either need to fill in some VPD structs at initialisation or
> > have some kind of vpd_ops that a driver can fill in so the core can get
> > at the data.
> 
> I've tried the first option -- creating a large block of sysfs entries for
> all the VPD entries that are present.  However, I've come upon a problem
> with sysfs that prevents me from doing so.
> 
> Basically, the problem is that sysfs doesn't pass the attribute that's
> being invoked to the attribute ->show method.  So I can't determine
> which one is being read.  This isn't a problem for any other sysfs attribute
> because they're all static, but for dynamically created attributes, it's
> not possible to work this way.

Ya, I ran into some similar restrictions with a driver I was
writing...after talking to gregkh, you are going to have to go down a
level and use kobjects directly...each piece of data will have a kobject, 
and that's what you dereference in the show method. 

-- 
Dave Boutcher
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:05    [from the cache]
©2003-2008