Re: [PATCH]generic usb serial driver

Oliver Neukum <[email protected]>
Newsgroups gmane.linux.usb.devel
Organization Novell
Message-ID <[email protected]>
Am Samstag, 31. März 2007 04:59 schrieb Alan Stern:
> There still remains the question of how to do this cleanly.  Obviously 
> some sort of synchronization primitive is needed.  wait_for_completion() 
> includes all the necessary memory barriers, whereas wait_event() does not.
> Or a spinlock could be used, although it would be somewhat awkward.

wait_event() is very bad in that regard. I'd even call it broken. It should
include memory barriers.

	Regards
		Oliver

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