[PATCH] powerpc: remove useless spinlock from mpc83xx watchdog

[Alan Cox]

On Iau, 2006-01-19 at 14:48 -0200, Marcelo Tosatti wrote:
> On Thu, Jan 19, 2006 at 09:49:16AM +0000, Alan Cox wrote:
> > 
> > 	f = open("/dev/watchdog", O_RDWR);
> > 	fork();
> > 	while(1) {
> > 		write(f, "Boing", 5);
> > 	}
> 
> Oops.
> 
> At least 50% of the watchdog drivers rely solely on the "wdt_is_open"
> atomic variable and are broken with respect to synchronization.

What an excellent janitors project