On Fri, Jan 29, 2016 at 11:08:58AM +0100, Henning Rogge wrote:
> mpp_path_del() and mesh_path_del() are mostly the same function.
> Move common code into a new static function.
>
> Signed-off-by: Henning Rogge <[email protected]>
> ---
> net/mac80211/mesh_pathtbl.c | 110
> ++++++++++++++++++++++----------------------
> 1 file changed, 55 insertions(+), 55 deletions(-)
>
> diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
> index 33bb1f25..86316ee 100644
> --- a/net/mac80211/mesh_pathtbl.c
> +++ b/net/mac80211/mesh_pathtbl.c
> @@ -55,16 +55,20 @@ int mpp_paths_generation;
> static DEFINE_RWLOCK(pathtbl_resize_lock);
>
>
> +static inline struct mesh_table *resize_dereference_paths(struct mesh_table
> *table)
0-day caught this -- the parameter should be "struct mesh_table __rcu *table"
You can install sparse, set CONFIG_SPARSE_RCU_POINTER=y and then check it
with something like:
make C=2 M=net/mac80211
The code is ok but the annotation catches cases where a dereference
would happen without the right lock -- in this case pathtable resize
lock is held.
> +{
> + return rcu_dereference_protected(table,
> + lockdep_is_held(&pathtbl_resize_lock));
> +}
> +
Besides that though, something is wrong with whitespace throughout
the patch, looks like lots of 2-space indents instead of tabs.
Approach looks fine though. I might've moved the resize lock into
table_path_del, but it doesn't really matter as I plan to replace
with rhashtable anyway.
--
Bob Copeland %% http://bobcopeland.com/
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