test_maple_tree: test maple_range_64 node in RCU mode

This commit adds a test that builds two maple_range_64 trees in RCU
mode.  The first tree has a root that is a full maple_range_64 node and
ensures that the destruction under RCU does not misinterpret the last
slot as metadata. 226 insertions produce such a root on a 64-bit build.

The second tree is a height 3 tree whose root holds 15 child pointers
and metadata in its last slot, so every slot is non-zero and ensures
that the destruction under RCU does not descend into the metadata slot.
3166 insertions produce such a tree on a 64-bit build.

Link: https://lore.kernel.org/20261005-fix-maple-tree-range64-rcu-v3-2-ebe7fb278e20@cslab.ece.ntua.gr
Signed-off-by: Dimitris Charisis <dchar@cslab.ece.ntua.gr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Liam R. Howlett (Google) <liam@infradead.org>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andrew Ballance <andrewjballance@gmail.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Florian Schmaus <florian.schmaus@codasip.com>

0 files changed, 0 insertions, 0 deletions