netdev - Re: [PATCH 1/7][MAC8021]: Fix one more call to synchronize

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Date:	Fri, 16 May 2008 15:05:36 +0400
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	"John W. Linville" <linville@...driver.com>
CC:	Johannes Berg <johannes@...solutions.net>,
	linux-wireless@...r.kernel.org,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH 1/7][MAC8021]: Fix one more call to synchronize_rcu in
 atomic context.

Hi, John. 

Sorry for bothering you, I guess that you're very busy now, 
but what are you plans about this set?

After I saw my first set included in some wireless git update,
I thought this one would be in some of the next ones (since
this set fixes some bugs in mesh tables), and started waiting.

Here's a new wireless git update and this set is still not in.
Shall I resubmit one?

Thanks,
Pavel

> (This set applies OK without the previous one of 4 patches,
>  but with some fuzz in the 7th one)
> 
> 
> The mesh_path_node_free() does so under hashwlock.
> 
> But, this one is called
> 1. from mesh_path_add() after an old hash is hidden and
>    synchronize_rcu() is calld
> 2. mesh_pathtbl_unregister(), when the module is being
>    unloaded and no devices exist to mess with this hash.
> 
> So, it seems to me, that simply removing the call is OK.
> 
> Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>
> 
> ---
>  net/mac80211/mesh_pathtbl.c |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
> 
> diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
> index 7097ef9..0b6c4bf 100644
> --- a/net/mac80211/mesh_pathtbl.c
> +++ b/net/mac80211/mesh_pathtbl.c
> @@ -458,7 +458,6 @@ static void mesh_path_node_free(struct hlist_node *p, bool free_leafs)
>  	struct mpath_node *node = hlist_entry(p, struct mpath_node, list);
>  	mpath = node->mpath;
>  	hlist_del_rcu(p);
> -	synchronize_rcu();
>  	if (free_leafs)
>  		kfree(mpath);
>  	kfree(node);

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