Re: hashed spinlocks

["David S. Miller" <davem@davemloft.net>]

From: Daniel Walker <dwalker@mvista.com>
Date: Sun, 31 Jul 2005 09:27:55 -0700

> >From 2.6.13-rc4 this hunk
> 
> +#else
> +# define rt_hash_lock_addr(slot) NULL
> +# define rt_hash_lock_init()
> +#endif
> 
> Doesn't work with the following,
> 
> +               spin_unlock(rt_hash_lock_addr(i));
> 
> 
> Cause your spin locking a NULL .. I would give a patch, but I'm not sure
> what should be done in this case..

That spinlock debugging code is such a pain in the butt,
nothing at all should be happening with spinlocks on
a non-SMP build.

We should just change the route.c ifdef to check for
CONFIG_DEBUG_SPINLOCK as well as CONFIG_SMP, in order
to fix this.

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