linux-kernel - Re: [patch 2/6] hugetlb: Fix section mismatches

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Message-Id: <1263397212.11942.97.camel@useless.americas.hpqcorp.net>
Date:	Wed, 13 Jan 2010 10:40:12 -0500
From:	Lee Schermerhorn <Lee.Schermerhorn@...com>
To:	Jeff Mahoney <jeffm@...e.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux-MM <linux-mm@...ck.org>
Subject: Re: [patch 2/6] hugetlb: Fix section mismatches

On Tue, 2010-01-12 at 19:48 -0500, Jeff Mahoney wrote:
> plain text document attachment (patches.rpmify)
> hugetlb_register_node calls hugetlb_sysfs_add_hstate, which is marked with
>  __init. Since hugetlb_register_node is only called by
>  hugetlb_register_all_nodes, which in turn is only called by hugetlb_init,
>  it's safe to mark both of them as __init.

Actually, hugetlb_register_node() also called, via a function pointer
that hugetlb registers with the sysfs node driver, when a node is hot
plugged.  So, I think the correct approach is to remove the '__init'
from hugetlb_sysfs_add_hstate() as this is also used at runtime.  I
missed this in the original submittal.

Regards,
Lee Schermerhorn

> 
> Signed-off-by: Jeff Mahoney <jeffm@...e.com>
> ---
>  mm/hugetlb.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -1630,7 +1630,7 @@ void hugetlb_unregister_node(struct node
>   * hugetlb module exit:  unregister hstate attributes from node sysdevs
>   * that have them.
>   */
> -static void hugetlb_unregister_all_nodes(void)
> +static void __init hugetlb_unregister_all_nodes(void)
>  {
>  	int nid;
>  
> @@ -1650,7 +1650,7 @@ static void hugetlb_unregister_all_nodes
>   * Register hstate attributes for a single node sysdev.
>   * No-op if attributes already registered.
>   */
> -void hugetlb_register_node(struct node *node)
> +void __init hugetlb_register_node(struct node *node)
>  {
>  	struct hstate *h;
>  	struct node_hstate *nhs = &node_hstates[node->sysdev.id];
> 
> 
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