Re: [PATCH 2/2] check_unsafe_exec: s/lock_task_sighand/rcu_read_lock/

[Hugh Dickins]

On Fri, 23 Apr 2009, Oleg Nesterov wrote:
>  	write_lock(&p->fs->lock);
> -	lock_task_sighand(p, &flags);
> +	rcu_read_lock();
>  	for (t = next_thread(p); t != p; t = next_thread(t)) {
>  		if (t->fs == p->fs)
>  			n_fs++;
>  	}
> +	rcu_read_lock();

Not quite! if second rcu_read_lock() changed to rcu_read_unlock(), then
Acked-by: Hugh Dickins <hugh@xxxxxxxxxxx>
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