[PATCH v4 33/35] maple_tree: Update testing code for mas_{next,prev,walk}

From: Liam R. Howlett
Date: Thu May 18 2023 - 15:34:11 EST

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In reply to: Liam R. Howlett: "[PATCH v4 13/35] maple_tree: Use MAS_WR_BUG_ON() in mas_store_prealloc()"
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Now that the functions have changed the limits, update the testing of
the maple tree to test these new settings.

Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
lib/test_maple_tree.c | 638 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 633 insertions(+), 5 deletions(-)

diff --git a/lib/test_maple_tree.c b/lib/test_maple_tree.c
index d295fdee2fae..9939be34e516 100644
--- a/lib/test_maple_tree.c
+++ b/lib/test_maple_tree.c
@@ -1322,6 +1322,7 @@ static noinline void __init check_root_expand(struct maple_tree *mt)
mas_lock(&mas);
mas_set(&mas, 3);
ptr = mas_walk(&mas);
+ MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, ptr != NULL);
MT_BUG_ON(mt, mas.index != 0);
MT_BUG_ON(mt, mas.last != ULONG_MAX);
@@ -1391,7 +1392,7 @@ static noinline void __init check_root_expand(struct maple_tree *mt)
mas_store_gfp(&mas, ptr, GFP_KERNEL);
ptr = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, ptr != NULL);
- MT_BUG_ON(mt, (mas.index != 1) && (mas.last != ULONG_MAX));
+ MT_BUG_ON(mt, (mas.index != ULONG_MAX) && (mas.last != ULONG_MAX));

mas_set(&mas, 1);
ptr = mas_prev(&mas, 0);
@@ -1800,7 +1801,6 @@ static noinline void __init check_iteration(struct maple_tree *mt)
mas.index = 760;
mas.last = 765;
mas_store(&mas, val);
- mas_next(&mas, ULONG_MAX);
}
i++;
}
@@ -2011,7 +2011,7 @@ static noinline void __init next_prev_test(struct maple_tree *mt)

val = mas_next(&mas, ULONG_MAX);
MT_BUG_ON(mt, val != NULL);
- MT_BUG_ON(mt, mas.index != ULONG_MAX);
+ MT_BUG_ON(mt, mas.index != 0x7d6);
MT_BUG_ON(mt, mas.last != ULONG_MAX);

val = mas_prev(&mas, 0);
@@ -2035,7 +2035,8 @@ static noinline void __init next_prev_test(struct maple_tree *mt)
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != NULL);
MT_BUG_ON(mt, mas.index != 0);
- MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.last != 5);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);

mas.index = 0;
mas.last = 5;
@@ -2047,7 +2048,7 @@ static noinline void __init next_prev_test(struct maple_tree *mt)
val = mas_prev(&mas, 0);
MT_BUG_ON(mt, val != NULL);
MT_BUG_ON(mt, mas.index != 0);
- MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.last != 9);
mas_unlock(&mas);

mtree_destroy(mt);
@@ -2750,6 +2751,629 @@ static noinline void __init check_empty_area_fill(struct maple_tree *mt)
mt_set_non_kernel(0);
}

+/*
+ * Check MAS_START, MAS_PAUSE, active (implied), and MAS_NONE transitions.
+ *
+ * The table below shows the single entry tree (0-0 pointer) and normal tree
+ * with nodes.
+ *
+ * Function ENTRY Start Result index & last
+ * ┬ ┬ ┬ ┬ ┬
+ * │ │ │ │ └─ the final range
+ * │ │ │ └─ The node value after execution
+ * │ │ └─ The node value before execution
+ * │ └─ If the entry exists or does not exists (DNE)
+ * └─ The function name
+ *
+ * Function ENTRY Start Result index & last
+ * mas_next()
+ * - after last
+ * Single entry tree at 0-0
+ * ------------------------
+ * DNE MAS_START MAS_NONE 1 - oo
+ * DNE MAS_PAUSE MAS_NONE 1 - oo
+ * DNE MAS_ROOT MAS_NONE 1 - oo
+ * when index = 0
+ * DNE MAS_NONE MAS_ROOT 0
+ * when index > 0
+ * DNE MAS_NONE MAS_NONE 1 - oo
+ *
+ * Normal tree
+ * -----------
+ * exists MAS_START active range
+ * DNE MAS_START active set to last range
+ * exists MAS_PAUSE active range
+ * DNE MAS_PAUSE active set to last range
+ * exists MAS_NONE active range
+ * exists active active range
+ * DNE active active set to last range
+ *
+ * Function ENTRY Start Result index & last
+ * mas_prev()
+ * - before index
+ * Single entry tree at 0-0
+ * ------------------------
+ * if index > 0
+ * exists MAS_START MAS_ROOT 0
+ * exists MAS_PAUSE MAS_ROOT 0
+ * exists MAS_NONE MAS_ROOT 0
+ *
+ * if index == 0
+ * DNE MAS_START MAS_NONE 0
+ * DNE MAS_PAUSE MAS_NONE 0
+ * DNE MAS_NONE MAS_NONE 0
+ * DNE MAS_ROOT MAS_NONE 0
+ *
+ * Normal tree
+ * -----------
+ * exists MAS_START active range
+ * DNE MAS_START active set to min
+ * exists MAS_PAUSE active range
+ * DNE MAS_PAUSE active set to min
+ * exists MAS_NONE active range
+ * DNE MAS_NONE MAS_NONE set to min
+ * any MAS_ROOT MAS_NONE 0
+ * exists active active range
+ * DNE active active last range
+ *
+ * Function ENTRY Start Result index & last
+ * mas_find()
+ * - at index or next
+ * Single entry tree at 0-0
+ * ------------------------
+ * if index > 0
+ * DNE MAS_START MAS_NONE 0
+ * DNE MAS_PAUSE MAS_NONE 0
+ * DNE MAS_ROOT MAS_NONE 0
+ * DNE MAS_NONE MAS_NONE 0
+ * if index == 0
+ * exists MAS_START MAS_ROOT 0
+ * exists MAS_PAUSE MAS_ROOT 0
+ * exists MAS_NONE MAS_ROOT 0
+ *
+ * Normal tree
+ * -----------
+ * exists MAS_START active range
+ * DNE MAS_START active set to max
+ * exists MAS_PAUSE active range
+ * DNE MAS_PAUSE active set to max
+ * exists MAS_NONE active range
+ * exists active active range
+ * DNE active active last range (max < last)
+ *
+ * Function ENTRY Start Result index & last
+ * mas_find_rev()
+ * - at index or before
+ * Single entry tree at 0-0
+ * ------------------------
+ * if index > 0
+ * exists MAS_START MAS_ROOT 0
+ * exists MAS_PAUSE MAS_ROOT 0
+ * exists MAS_NONE MAS_ROOT 0
+ * if index == 0
+ * DNE MAS_START MAS_NONE 0
+ * DNE MAS_PAUSE MAS_NONE 0
+ * DNE MAS_NONE MAS_NONE 0
+ * DNE MAS_ROOT MAS_NONE 0
+ *
+ * Normal tree
+ * -----------
+ * exists MAS_START active range
+ * DNE MAS_START active set to min
+ * exists MAS_PAUSE active range
+ * DNE MAS_PAUSE active set to min
+ * exists MAS_NONE active range
+ * exists active active range
+ * DNE active active last range (min > index)
+ *
+ * Function ENTRY Start Result index & last
+ * mas_walk()
+ * - Look up index
+ * Single entry tree at 0-0
+ * ------------------------
+ * if index > 0
+ * DNE MAS_START MAS_ROOT 1 - oo
+ * DNE MAS_PAUSE MAS_ROOT 1 - oo
+ * DNE MAS_NONE MAS_ROOT 1 - oo
+ * DNE MAS_ROOT MAS_ROOT 1 - oo
+ * if index == 0
+ * exists MAS_START MAS_ROOT 0
+ * exists MAS_PAUSE MAS_ROOT 0
+ * exists MAS_NONE MAS_ROOT 0
+ * exists MAS_ROOT MAS_ROOT 0
+ *
+ * Normal tree
+ * -----------
+ * exists MAS_START active range
+ * DNE MAS_START active range of NULL
+ * exists MAS_PAUSE active range
+ * DNE MAS_PAUSE active range of NULL
+ * exists MAS_NONE active range
+ * DNE MAS_NONE active range of NULL
+ * exists active active range
+ * DNE active active range of NULL
+ */
+
+#define mas_active(x) (((x).node != MAS_ROOT) && \
+ ((x).node != MAS_START) && \
+ ((x).node != MAS_PAUSE) && \
+ ((x).node != MAS_NONE))
+static noinline void __init check_state_handling(struct maple_tree *mt)
+{
+ MA_STATE(mas, mt, 0, 0);
+ void *entry, *ptr = (void *) 0x1234500;
+ void *ptr2 = &ptr;
+ void *ptr3 = &ptr2;
+
+ /* Check MAS_ROOT First */
+ mtree_store_range(mt, 0, 0, ptr, GFP_KERNEL);
+
+ mas_lock(&mas);
+ /* prev: Start -> none */
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* prev: Start -> root */
+ mas_set(&mas, 10);
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* prev: pause -> root */
+ mas_set(&mas, 10);
+ mas_pause(&mas);
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* next: start -> none */
+ mas_set(&mas, 0);
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* next: start -> none */
+ mas_set(&mas, 10);
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find: start -> root */
+ mas_set(&mas, 0);
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* find: root -> none */
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find: none -> none */
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find: start -> none */
+ mas_set(&mas, 10);
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find_rev: none -> root */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* find_rev: start -> root */
+ mas_set(&mas, 0);
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* find_rev: root -> none */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find_rev: none -> none */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* find_rev: start -> root */
+ mas_set(&mas, 10);
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* walk: start -> none */
+ mas_set(&mas, 10);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* walk: pause -> none*/
+ mas_set(&mas, 10);
+ mas_pause(&mas);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* walk: none -> none */
+ mas.index = mas.last = 10;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* walk: none -> none */
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* walk: start -> root */
+ mas_set(&mas, 0);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* walk: pause -> root */
+ mas_set(&mas, 0);
+ mas_pause(&mas);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* walk: none -> root */
+ mas.node = MAS_NONE;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* walk: root -> root */
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ /* walk: root -> none */
+ mas_set(&mas, 10);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 1);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, mas.node != MAS_NONE);
+
+ /* walk: none -> root */
+ mas.index = mas.last = 0;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0);
+ MT_BUG_ON(mt, mas.node != MAS_ROOT);
+
+ mas_unlock(&mas);
+
+ /* Check when there is an actual node */
+ mtree_store_range(mt, 0, 0, NULL, GFP_KERNEL);
+ mtree_store_range(mt, 0x1000, 0x1500, ptr, GFP_KERNEL);
+ mtree_store_range(mt, 0x2000, 0x2500, ptr2, GFP_KERNEL);
+ mtree_store_range(mt, 0x3000, 0x3500, ptr3, GFP_KERNEL);
+
+ mas_lock(&mas);
+
+ /* next: start ->active */
+ mas_set(&mas, 0);
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next: pause ->active */
+ mas_set(&mas, 0);
+ mas_pause(&mas);
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next: none ->active */
+ mas.index = mas.last = 0;
+ mas.offset = 0;
+ mas.node = MAS_NONE;
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next:active ->active */
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr2);
+ MT_BUG_ON(mt, mas.index != 0x2000);
+ MT_BUG_ON(mt, mas.last != 0x2500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next:active -> active out of range*/
+ entry = mas_next(&mas, 0x2999);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x2501);
+ MT_BUG_ON(mt, mas.last != 0x2fff);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* Continue after out of range*/
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr3);
+ MT_BUG_ON(mt, mas.index != 0x3000);
+ MT_BUG_ON(mt, mas.last != 0x3500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next:active -> active out of range*/
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x3501);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* next: none -> active, skip value at location */
+ mas_set(&mas, 0);
+ entry = mas_next(&mas, ULONG_MAX);
+ mas.node = MAS_NONE;
+ mas.offset = 0;
+ entry = mas_next(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr2);
+ MT_BUG_ON(mt, mas.index != 0x2000);
+ MT_BUG_ON(mt, mas.last != 0x2500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* prev:active ->active */
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* prev:active -> active out of range*/
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0x0FFF);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* prev: pause ->active */
+ mas_set(&mas, 0x3600);
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr3);
+ mas_pause(&mas);
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr2);
+ MT_BUG_ON(mt, mas.index != 0x2000);
+ MT_BUG_ON(mt, mas.last != 0x2500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* prev:active -> active out of range*/
+ entry = mas_prev(&mas, 0x1600);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x1501);
+ MT_BUG_ON(mt, mas.last != 0x1FFF);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* prev: active ->active, continue*/
+ entry = mas_prev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find: start ->active */
+ mas_set(&mas, 0);
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find: pause ->active */
+ mas_set(&mas, 0);
+ mas_pause(&mas);
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find: start ->active on value */;
+ mas_set(&mas, 1200);
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find:active ->active */
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != ptr2);
+ MT_BUG_ON(mt, mas.index != 0x2000);
+ MT_BUG_ON(mt, mas.last != 0x2500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+
+ /* find:active -> active (NULL)*/
+ entry = mas_find(&mas, 0x2700);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x2501);
+ MT_BUG_ON(mt, mas.last != 0x2FFF);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find: none ->active */
+ entry = mas_find(&mas, 0x5000);
+ MT_BUG_ON(mt, entry != ptr3);
+ MT_BUG_ON(mt, mas.index != 0x3000);
+ MT_BUG_ON(mt, mas.last != 0x3500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find:active -> active (NULL) end*/
+ entry = mas_find(&mas, ULONG_MAX);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x3501);
+ MT_BUG_ON(mt, mas.last != ULONG_MAX);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find_rev: active (END) ->active */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr3);
+ MT_BUG_ON(mt, mas.index != 0x3000);
+ MT_BUG_ON(mt, mas.last != 0x3500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find_rev:active ->active */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr2);
+ MT_BUG_ON(mt, mas.index != 0x2000);
+ MT_BUG_ON(mt, mas.last != 0x2500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find_rev: pause ->active */
+ mas_pause(&mas);
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find_rev:active -> active */
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0);
+ MT_BUG_ON(mt, mas.last != 0x0FFF);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* find_rev: start ->active */
+ mas_set(&mas, 0x1200);
+ entry = mas_find_rev(&mas, 0);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk start ->active */
+ mas_set(&mas, 0x1200);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk start ->active */
+ mas_set(&mas, 0x1600);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x1501);
+ MT_BUG_ON(mt, mas.last != 0x1fff);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk pause ->active */
+ mas_set(&mas, 0x1200);
+ mas_pause(&mas);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk pause -> active */
+ mas_set(&mas, 0x1600);
+ mas_pause(&mas);
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x1501);
+ MT_BUG_ON(mt, mas.last != 0x1fff);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk none -> active */
+ mas_set(&mas, 0x1200);
+ mas.node = MAS_NONE;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk none -> active */
+ mas_set(&mas, 0x1600);
+ mas.node = MAS_NONE;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x1501);
+ MT_BUG_ON(mt, mas.last != 0x1fff);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk active -> active */
+ mas.index = 0x1200;
+ mas.last = 0x1200;
+ mas.offset = 0;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != ptr);
+ MT_BUG_ON(mt, mas.index != 0x1000);
+ MT_BUG_ON(mt, mas.last != 0x1500);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ /* mas_walk active -> active */
+ mas.index = 0x1600;
+ mas.last = 0x1600;
+ entry = mas_walk(&mas);
+ MT_BUG_ON(mt, entry != NULL);
+ MT_BUG_ON(mt, mas.index != 0x1501);
+ MT_BUG_ON(mt, mas.last != 0x1fff);
+ MT_BUG_ON(mt, !mas_active(mas));
+
+ mas_unlock(&mas);
+}
+
static DEFINE_MTREE(tree);
static int __init maple_tree_seed(void)
{
@@ -3011,6 +3635,10 @@ static int __init maple_tree_seed(void)
mtree_destroy(&tree);

+ mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
+ check_state_handling(&tree);
+ mtree_destroy(&tree);
+
#if defined(BENCH)
skip:
#endif
--
2.39.2

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