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maple_tree: update the documentation of maple tree

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Introduce the new interface mtree_dup() in the documentation.

Link: https://lkml.kernel.org/r/20231027033845.90608-7-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Peng Zhang 2023-10-27 11:38:41 +08:00 committed by Andrew Morton
parent a2587a7e8d
commit 9bc1d3cdb9
1 changed files with 4 additions and 0 deletions
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4
Documentation/core-api/maple_tree.rst
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@ -81,6 +81,9 @@ section.
Sometimes it is necessary to ensure the next call to store to a maple tree does
not allocate memory, please see :ref:`maple-tree-advanced-api` for this use case.
You can use mtree_dup() to duplicate an entire maple tree. It is a more
efficient way than inserting all elements one by one into a new tree.
Finally, you can remove all entries from a maple tree by calling
mtree_destroy(). If the maple tree entries are pointers, you may wish to free
the entries first.
@ -112,6 +115,7 @@ Takes ma_lock internally:
* mtree_insert()
* mtree_insert_range()
* mtree_erase()
* mtree_dup()
* mtree_destroy()
* mt_set_in_rcu()
* mt_clear_in_rcu()