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test_maple_tree: add test for mas_spanning_rebalance() on insufficient data 

Add a test to the maple tree test suite for the spanning rebalance
insufficient node issue does not go undetected again.

Link: https://lkml.kernel.org/r/20221219161922.2708732-3-Liam.Howlett@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Andrei Vagin <avagin@gmail.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam Howlett 2022-12-19 16:20:15 +00:00 committed by Andrew Morton
parent 0abb964aae
commit c5651b31f5
1 changed files with 23 additions and 0 deletions
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23
lib/test_maple_tree.c
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@ -2498,6 +2498,25 @@ static noinline void check_dup(struct maple_tree *mt)
}
}
static noinline void check_bnode_min_spanning(struct maple_tree *mt)
{
int i = 50;
MA_STATE(mas, mt, 0, 0);
mt_set_non_kernel(9999);
mas_lock(&mas);
do {
mas_set_range(&mas, i*10, i*10+9);
mas_store(&mas, check_bnode_min_spanning);
} while (i--);
mas_set_range(&mas, 240, 509);
mas_store(&mas, NULL);
mas_unlock(&mas);
mas_destroy(&mas);
mt_set_non_kernel(0);
}
static DEFINE_MTREE(tree);
static int maple_tree_seed(void)
{
@ -2742,6 +2761,10 @@ static int maple_tree_seed(void)
check_dup(&tree);
mtree_destroy(&tree);
mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
check_bnode_min_spanning(&tree);
mtree_destroy(&tree);
#if defined(BENCH)
skip:
#endif