linux-kernel - Re: [PATCH tip/core/rcu 13/28] nfs,rcu: Convert call_rcu(nfs_free_delegation_callback) to kfree

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Date:	Thu, 09 Jun 2011 13:12:23 -0400
From:	Trond Myklebust <Trond.Myklebust@...app.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	niv@...ibm.com, tglx@...utronix.de, peterz@...radead.org,
	rostedt@...dmis.org, Valdis.Kletnieks@...edu, dhowells@...hat.com,
	eric.dumazet@...il.com, darren@...art.com, patches@...aro.org
Subject: Re: [PATCH tip/core/rcu 13/28] nfs,rcu: Convert
 call_rcu(nfs_free_delegation_callback) to kfree_rcu()

On Wed, 2011-06-08 at 12:29 -0700, Paul E. McKenney wrote: 
> From: Lai Jiangshan <laijs@...fujitsu.com>
> 
> The rcu callback nfs_free_delegation_callback() just calls a kfree(),
> so we use kfree_rcu() instead of the call_rcu(nfs_free_delegation_callback).
> 
> Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
> Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> Cc: Trond Myklebust <Trond.Myklebust@...app.com>
> Reviewed-by: Josh Triplett <josh@...htriplett.org>

Acked-by: Trond Myklebust <Trond.Myklebust@...app.com>

> ---
>  fs/nfs/delegation.c |   14 +-------------
>  1 files changed, 1 insertions(+), 13 deletions(-)
> 
> diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
> index bbbc6bf..dd25c2a 100644
> --- a/fs/nfs/delegation.c
> +++ b/fs/nfs/delegation.c
> @@ -21,25 +21,13 @@
>  #include "delegation.h"
>  #include "internal.h"
>  
> -static void nfs_do_free_delegation(struct nfs_delegation *delegation)
> -{
> -	kfree(delegation);
> -}
> -
> -static void nfs_free_delegation_callback(struct rcu_head *head)
> -{
> -	struct nfs_delegation *delegation = container_of(head, struct nfs_delegation, rcu);
> -
> -	nfs_do_free_delegation(delegation);
> -}
> -
>  static void nfs_free_delegation(struct nfs_delegation *delegation)
>  {
>  	if (delegation->cred) {
>  		put_rpccred(delegation->cred);
>  		delegation->cred = NULL;
>  	}
> -	call_rcu(&delegation->rcu, nfs_free_delegation_callback);
> +	kfree_rcu(delegation, rcu);
>  }
>  
>  /**

-- 
Trond Myklebust
Linux NFS client maintainer

NetApp
Trond.Myklebust@...app.com
www.netapp.com

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