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

[Minchan Kim]

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@xxxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan@xxxxxxxxxx>

-- 
Kind regards,
Minchan Kim
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