linux-kernel - Re: [KJ][PATCH 03/04]use set_current

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Date:	Sat, 14 Apr 2007 11:39:11 +0200
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Milind Arun Choudhary <milindchoudhary@...il.com>
CC:	kernel-janitors@...ts.osdl.org, nfs@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	trond.myklebust@....uio.no
Subject: Re: [KJ][PATCH 03/04]use set_current_state in fs

Milind Arun Choudhary a écrit :
> use set_current_state(TASK_*) instead of current->state = TASK_*, in fs/nfs
> 
> Signed-off-by: Milind Arun Choudhary <milindchoudhary@...il.com>
> 
> 
> ---
>  idmap.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
> index 9d4a6b2..054ca15 100644
> --- a/fs/nfs/idmap.c
> +++ b/fs/nfs/idmap.c
> @@ -272,7 +272,7 @@ nfs_idmap_id(struct idmap *idmap, struct idmap_hashtable *h,
>  	set_current_state(TASK_UNINTERRUPTIBLE);
>  	mutex_unlock(&idmap->idmap_im_lock);
>  	schedule();
> -	current->state = TASK_RUNNING;
> +	set_current_state(TASK_RUNNING);
>  	remove_wait_queue(&idmap->idmap_wq, &wq);
>  	mutex_lock(&idmap->idmap_im_lock);

Probably a dumb question, so please forgive me.

Why are you  forcing a memory barrier here, (and also on your other patches).

Is'nt a  __set_current_state(TASK_RUNNING); appropriate ?


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