Re: [PATCH RFC] drivers/core: Replace lockdep_set_novalidate_class() with unique class keys

[Alan Stern]

On Mon, Feb 13, 2023 at 10:27:18AM +0100, Peter Zijlstra wrote:
> On Sun, Feb 12, 2023 at 03:19:16PM -0500, Alan Stern wrote:
> 
> > (Device names are often set after the device is initialized.  Does 
> > lockdep mind if a lock_class_key's name is changed after it has been 
> > registered?)
> 
> It does, althought I don't at the moment recall how hard it would be to
> change that.

If the names are only used for printing purposes, or other similarly 
innocuous things, it ought to be enough to set the name with 
smp_store_release() and read the name with smp_load_acquire().

Alan Stern