linux-kernel - Re: [PATCH 09/10] Integrate the ridr code into IPC code

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Message-ID: <20080501043258.GH30274@tpepper-t42p.dolavim.us>
Date:	Wed, 30 Apr 2008 21:32:59 -0700
From:	Tim Pepper <lnxninja@...ux.vnet.ibm.com>
To:	Nadia.Derbey@...l.net
Cc:	manfred@...orfullife.com, paulmck@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org, efault@....de,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 09/10] Integrate the ridr code into IPC code

On Tue 29 Apr at 16:33:13 +0200 Nadia.Derbey@...l.net said:
> [PATCH 09/10]
> 
> This patche makes the ipc ode use the ridr API.

Superfluous except...

> @@ -699,18 +695,13 @@ struct kern_ipc_perm *ipc_lock(struct ip
>  	struct kern_ipc_perm *out;
>  	int lid = ipcid_to_idx(id);
> 
> -	down_read(&ids->rw_mutex);
> -
>  	rcu_read_lock();
> -	out = idr_find(&ids->ipcs_idr, lid);
> +	out = ridr_find(&ids->ipcs_ridr, lid);
>  	if (out == NULL) {
>  		rcu_read_unlock();
> -		up_read(&ids->rw_mutex);
>  		return ERR_PTR(-EINVAL);
>  	}
> 
> -	up_read(&ids->rw_mutex);
> -

...the removal of the rw_mutex down/up_read().


-- 
Tim Pepper  <lnxninja@...ux.vnet.ibm.com>
IBM Linux Technology Center
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