linux-kernel - Re: [PATCH] nodmask.h: remove macro any_online

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Message-Id: <20100107085146.59cc9888.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 7 Jan 2010 08:51:46 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...abs.org, devicetree-discuss@...ts.ozlabs.org,
	linux-nfs@...r.kernel.org, netdev@...r.kernel.org,
	akpm@...ux-foundation.org, rientjes@...gle.com, mel@....ul.ie,
	lee.schermerhorn@...com, benh@...nel.crashing.org,
	paulus@...ba.org, dave@...ux.vnet.ibm.com, miltonm@....com,
	nfont@...tin.ibm.com, geoffrey.levand@...sony.com,
	grant.likely@...retlab.ca, bfields@...ldses.org, neilb@...e.de,
	Trond.Myklebust@...app.com, davem@...emloft.net,
	bhalevy@...asas.com, chuck.lever@...cle.com,
	Ricardo.Labiaga@...app.com
Subject: Re: [PATCH] nodmask.h: remove macro any_online_node

On Wed, 6 Jan 2010 16:24:58 -0700
H Hartley Sweeten <hartleys@...ionengravers.com> wrote:

> nodmask.h: remove macro any_online_node
> 
> The macro any_online_node is prone to producing sparse warnings
> due to the local symbol 'node'. Since all the in-tree users are really
> requesting the first online node (the mask argument is either
> NODE_MASK_ALL or node_online_map) just use the first_online_node
> macro and remove the any_online_node macro since there are no users.
> 

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Thank you.
BTW, it's better to add diffstat to this kind of changes.

Regards,
-Kame

> Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: David Rientjes <rientjes@...gle.com>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Mel Gorman <mel@....ul.ie>
> Cc: Lee Schermerhorn <lee.schermerhorn@...com>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: Dave Hansen <dave@...ux.vnet.ibm.com>
> Cc: Milton Miller <miltonm@....com>
> Cc: Nathan Fontenot <nfont@...tin.ibm.com>
> Cc: Geoff Levand <geoffrey.levand@...sony.com>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: J. Bruce Fields <bfields@...ldses.org>
> Cc: Neil Brown <neilb@...e.de>
> Cc: Trond Myklebust <Trond.Myklebust@...app.com>
> Cc: David S. Miller <davem@...emloft.net>
> Cc: Benny Halevy <bhalevy@...asas.com>
> Cc: Chuck Lever <chuck.lever@...cle.com>
> Cc: Ricardo Labiaga <Ricardo.Labiaga@...app.com>
> 
> ---
> 
> diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
> index b037d95..64c0022 100644
> --- a/arch/powerpc/mm/numa.c
> +++ b/arch/powerpc/mm/numa.c
> @@ -451,7 +451,7 @@ static int __cpuinit numa_setup_cpu(unsigned long lcpu)
>  	nid = of_node_to_nid_single(cpu);
>  
>  	if (nid < 0 || !node_online(nid))
> -		nid = any_online_node(NODE_MASK_ALL);
> +		nid = first_online_node;
>  out:
>  	map_cpu_to_node(lcpu, nid);
>  
> @@ -1114,7 +1114,7 @@ int hot_add_scn_to_nid(unsigned long scn_addr)
>  	int nid, found = 0;
>  
>  	if (!numa_enabled || (min_common_depth < 0))
> -		return any_online_node(NODE_MASK_ALL);
> +		return first_online_node;
>  
>  	memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
>  	if (memory) {
> @@ -1125,7 +1125,7 @@ int hot_add_scn_to_nid(unsigned long scn_addr)
>  	}
>  
>  	if (nid < 0 || !node_online(nid))
> -		nid = any_online_node(NODE_MASK_ALL);
> +		nid = first_online_node;
>  
>  	if (NODE_DATA(nid)->node_spanned_pages)
>  		return nid;
> diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
> index 454997c..c4fa64b 100644
> --- a/include/linux/nodemask.h
> +++ b/include/linux/nodemask.h
> @@ -69,8 +69,6 @@
>   * int node_online(node)		Is some node online?
>   * int node_possible(node)		Is some node possible?
>   *
> - * int any_online_node(mask)		First online node in mask
> - *
>   * node_set_online(node)		set bit 'node' in node_online_map
>   * node_set_offline(node)		clear bit 'node' in node_online_map
>   *
> @@ -467,15 +465,6 @@ static inline int num_node_state(enum node_states state)
>  #define node_online_map 	node_states[N_ONLINE]
>  #define node_possible_map 	node_states[N_POSSIBLE]
>  
> -#define any_online_node(mask)			\
> -({						\
> -	int node;				\
> -	for_each_node_mask(node, (mask))	\
> -		if (node_online(node))		\
> -			break;			\
> -	node;					\
> -})
> -
>  #define num_online_nodes()	num_node_state(N_ONLINE)
>  #define num_possible_nodes()	num_node_state(N_POSSIBLE)
>  #define node_online(node)	node_state((node), N_ONLINE)
> diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
> index 538ca43..832c1fe 100644
> --- a/net/sunrpc/svc.c
> +++ b/net/sunrpc/svc.c
> @@ -133,7 +133,7 @@ svc_pool_map_choose_mode(void)
>  		return SVC_POOL_PERNODE;
>  	}
>  
> -	node = any_online_node(node_online_map);
> +	node = first_online_node;
>  	if (nr_cpus_node(node) > 2) {
>  		/*
>  		 * Non-trivial SMP, or CONFIG_NUMA on
> --
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