[PATCH 7/8] ppc64: SPU file system

[Benjamin Herrenschmidt]

> /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 ?

Ben.