Re: [PATCH 7/8] ppc64: SPU file system

[Pavel Machek]

Hi!

> > /run	A stub file that lets us do ioctl. The only ioctl
> > 	method we need is the spu_run() call. spu_run suspends
> > 	the current thread from the host CPU and transfers
> > 	the flow of execution to the SPU.
> > 	The ioctl call return to the calling thread when a state
> > 	is entered that can not be handled by the kernel, e.g.
> > 	an error in the SPU code or an exit() from it.
> > 	When a signal is pending for the host CPU thread, the
> > 	ioctl is interrupted and the SPU stopped in order to
> > 	call the signal handler.
> 
> ioctl's are generally considered evil ... what about a write() method
> writing a command ?

That's even more evil than ioctl()... Try doing 32-vs-64bit conversion
on write...
								Pavel
-- 
Boycott Kodak -- for their patent abuse against Java.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/