Re: [RESEND PATCH v7 1/1] PCI/sysfs: Expose PCIe device serial number

[Krzysztof Wilczyński]

Hi Thomas,

> > > It's a waste of resources to provide a handle just to say the capability
> > > doesn't exist when the handle could just not exist instead.
> > 
> > I haven't checked how the kernfs side looks like, admittedly, but I think
> > whether an attribute is visible or not, it does not unload and/or de-allocate
> > any space for the accompanying kernfs object...  So, the resources saving
> > here might not be in any way significant.
> 
> If I read the sysfs code correctly (create_files() in fs/sysfs/group.c),
> the kernfs node should not even be allocated for invisible files.

Good to know!  I wasn't sure and did look...  I stand corrected now.

Thank you for taking the time to check this.  Much appreciated. :)

Thank you!

	Krzysztof