Re: [patch 2/9] lib: radix-tree: radix_tree_delete_item()

Minchan Kim
2013-11-25T08:20:19Z

On Sun, Nov 24, 2013 at 06:38:21PM -0500, Johannes Weiner wrote:
> Provide a function that does not just delete an entry at a given
> index, but also allows passing in an expected item. Delete only if
> that item is still located at the specified index.
>
> This is handy when lockless tree traversals want to delete entries as
> well because they don't have to do an second, locked lookup to verify
> the slot has not changed under them before deleting the entry.
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Minchan Kim <minchan@kernel.org>

--
Kind regards,
Minchan Kim