Re: [BUG] mm: bdi: export BDI attributes in sysfs

[Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>]

On Thu, 15 May 2008, Miklos Szeredi wrote:
> 
> Actually nothing should need protection.  The only problem AFAICS is
> that the device_create()/dev_set_drvdata() interface is racy: somebody
> can come in after the device has been created but before drvdata has
> been set, and then we are in trouble.

Well, I'm not sure that the locking should be at that level. Maybe the 
locking *should* be in the driver that does this. It may need to do other 
setup too, after all.

Of course, doing a device_create_drvdata() thing might be the right 
solution, at least part of the time. Greg?

		Linus
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