Re: [RFC,PATCH 2/4] Deprecate synchronize_kernel, GPL replacement

[Dipankar Sarma <dipankar@in.ibm.com>]

On Sat, Apr 02, 2005 at 10:21:50PM -0800, Paul E. McKenney wrote:
> The synchronize_kernel() primitive is used for quite a few different
> purposes: waiting for RCU readers, waiting for NMIs, waiting for interrupts,
> and so on.  This makes RCU code harder to read, since synchronize_kernel()
> might or might not have matching rcu_read_lock()s.  This patch creates
> a new synchronize_rcu() that is to be used for RCU readers and a new
> synchronize_sched() that is used for the rest.  These two new primitives
> currently have the same implementation, but this is might well change
> with additional real-time support.  Both new primitives are GPL-only,
> the old primitive is deprecated.
> 
> Signed-off-by: <paulmck@us.ibm.com>
> ---
> Depends on earlier "Add deprecated_for_modules" patch.
> 
> +/*
> + * Deprecated, use synchronize_rcu() or synchronize_sched() instead.
> + */
> +void synchronize_kernel(void)
> +{
> +	synchronize_rcu();
> +}
> +

We should probably mark it deprecated - 

void __deprecated synchronize_kernel(void)
{
	synchronize_rcu();
}

Thanks
Dipankar