linux-kernel - Re: [PATCH] hashtable: add hash_for_each_possible_rcu

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Message-ID: <51E3C92B.2070704@ozlabs.ru>
Date:	Mon, 15 Jul 2013 20:04:27 +1000
From:	Alexey Kardashevskiy <aik@...abs.ru>
To:	Alexey Kardashevskiy <aik@...abs.ru>
CC:	linuxppc-dev@...ts.ozlabs.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Sasha Levin <sasha.levin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hashtable: add hash_for_each_possible_rcu_notrace()

Anyone, ping?

On 07/06/2013 02:16 PM, Alexey Kardashevskiy wrote:
> This adds hash_for_each_possible_rcu_notrace() which is basically
> a notrace clone of hash_for_each_possible_rcu() which cannot be
> used in real mode due to its tracing/debugging capability.
> 
> Signed-off-by: Alexey Kardashevskiy <aik@...abs.ru>
> ---
>  include/linux/hashtable.h | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/include/linux/hashtable.h b/include/linux/hashtable.h
> index a9df51f..af8b169 100644
> --- a/include/linux/hashtable.h
> +++ b/include/linux/hashtable.h
> @@ -174,6 +174,21 @@ static inline void hash_del_rcu(struct hlist_node *node)
>  		member)
>  
>  /**
> + * hash_for_each_possible_rcu_notrace - iterate over all possible objects hashing
> + * to the same bucket in an rcu enabled hashtable in a rcu enabled hashtable
> + * @name: hashtable to iterate
> + * @obj: the type * to use as a loop cursor for each entry
> + * @member: the name of the hlist_node within the struct
> + * @key: the key of the objects to iterate over
> + *
> + * This is the same as hash_for_each_possible_rcu() except that it does
> + * not do any RCU debugging or tracing.
> + */
> +#define hash_for_each_possible_rcu_notrace(name, obj, member, key)	\
> +	hlist_for_each_entry_rcu_notrace(obj, &name[hash_min(key, HASH_BITS(name))],\
> +		member)
> +
> +/**
>   * hash_for_each_possible_safe - iterate over all possible objects hashing to the
>   * same bucket safe against removals
>   * @name: hashtable to iterate
> 


-- 
Alexey
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