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Message-ID: <20230504185023.4osqa3spndsawvl4@revolver>
Date: Thu, 4 May 2023 14:50:23 -0400
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: Peng Zhang <zhangpeng.00@...edance.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
maple-tree@...ts.infradead.org,
Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 26/34] maple_tree: Update testing code for
mas_{next,prev,walk}
* Peng Zhang <zhangpeng.00@...edance.com> [230503 23:33]:
>
>
> 在 2023/4/25 22:09, Liam R. Howlett 写道:
> > 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@...cle.com>
> > ---
> > lib/test_maple_tree.c | 641 +++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 635 insertions(+), 6 deletions(-)
> >
> > diff --git a/lib/test_maple_tree.c b/lib/test_maple_tree.c
> > index ae08d34d1d3c4..345eef526d8b0 100644
> > --- a/lib/test_maple_tree.c
> > +++ b/lib/test_maple_tree.c
> > @@ -1290,6 +1290,7 @@ static noinline void __init check_root_expand(struct maple_tree *mt)
> > mas_lock(&mas);
> > mas_set(&mas, 3);
> > ptr = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > MT_BUG_ON(mt, ptr != NULL);
> > MT_BUG_ON(mt, mas.index != 0);
> > MT_BUG_ON(mt, mas.last != ULONG_MAX);
> > @@ -1300,7 +1301,7 @@ static noinline void __init check_root_expand(struct maple_tree *mt)
> > mas_set(&mas, 0);
> > ptr = mas_walk(&mas);
> > - MT_BUG_ON(mt, ptr != NULL);
> > + MAS_BUG_ON(&mas, ptr != NULL);
> > mas_set(&mas, 1);
> > ptr = mas_walk(&mas);
> > @@ -1359,7 +1360,7 @@ 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));
> > + MAS_BUG_ON(&mas, (mas.index != ULONG_MAX) && (mas.last != ULONG_MAX));
> > mas_set(&mas, 1);
> > ptr = mas_prev(&mas, 0);
> > @@ -1768,12 +1769,12 @@ 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++;
> > }
> > /* Make sure the next find returns the one after 765, 766-769 */
> > val = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, val != xa_mk_value(76));
> > MT_BUG_ON(mt, val != xa_mk_value(76));
> > mas_unlock(&mas);
> > mas_destroy(&mas);
> > @@ -1979,7 +1980,7 @@ 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);
> > @@ -2003,7 +2004,8 @@ 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;
> > @@ -2015,7 +2017,7 @@ 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);
> > @@ -2718,6 +2720,629 @@ 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 of does not exists (DNE)
> of->or?
Yes, thank you.
> > + * └─ 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);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* prev: Start -> root */
> > + mas_set(&mas, 10);
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* prev: pause -> root */
> > + mas_set(&mas, 10);
> > + mas_pause(&mas);
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* next: start -> none */
> > + mas_set(&mas, 0);
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* next: start -> none */
> > + mas_set(&mas, 10);
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find: start -> root */
> > + mas_set(&mas, 0);
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* find: root -> none */
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find: none -> none */
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find: start -> none */
> > + mas_set(&mas, 10);
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find_rev: none -> root */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* find_rev: start -> root */
> > + mas_set(&mas, 0);
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* find_rev: root -> none */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find_rev: none -> none */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* find_rev: start -> root */
> > + mas_set(&mas, 10);
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* walk: start -> none */
> > + mas_set(&mas, 10);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* walk: pause -> none*/
> > + mas_set(&mas, 10);
> > + mas_pause(&mas);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* walk: none -> none */
> > + mas.index = mas.last = 10;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* walk: none -> none */
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* walk: start -> root */
> > + mas_set(&mas, 0);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* walk: pause -> root */
> > + mas_set(&mas, 0);
> > + mas_pause(&mas);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* walk: none -> root */
> > + mas.node = MAS_NONE;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* walk: root -> root */
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, mas.node != MAS_ROOT);
> > +
> > + /* walk: root -> none */
> > + mas_set(&mas, 10);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 1);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, mas.node != MAS_NONE);
> > +
> > + /* walk: none -> root */
> > + mas.index = mas.last = 0;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0);
> > + MAS_BUG_ON(&mas, 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);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* next: pause ->active */
> > + mas_set(&mas, 0);
> > + mas_pause(&mas);
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* next: none ->active */
> > + mas.index = mas.last = 0;
> > + mas.offset = 0;
> > + mas.node = MAS_NONE;
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* next:active ->active */
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr2);
> > + MAS_BUG_ON(&mas, mas.index != 0x2000);
> > + MAS_BUG_ON(&mas, mas.last != 0x2500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* next:active -> active out of range*/
> > + entry = mas_next(&mas, 0x2999);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x2501);
> > + MAS_BUG_ON(&mas, mas.last != 0x2fff);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* Continue after out of range*/
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr3);
> > + MAS_BUG_ON(&mas, mas.index != 0x3000);
> > + MAS_BUG_ON(&mas, mas.last != 0x3500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* next:active -> active out of range*/
> > + entry = mas_next(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x3501);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, !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);
> > + MAS_BUG_ON(&mas, entry != ptr2);
> > + MAS_BUG_ON(&mas, mas.index != 0x2000);
> > + MAS_BUG_ON(&mas, mas.last != 0x2500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* prev:active ->active */
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* prev:active -> active out of range*/
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0x0FFF);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* prev: pause ->active */
> > + mas_set(&mas, 0x3600);
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr3);
> > + mas_pause(&mas);
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr2);
> > + MAS_BUG_ON(&mas, mas.index != 0x2000);
> > + MAS_BUG_ON(&mas, mas.last != 0x2500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* prev:active -> active out of range*/
> > + entry = mas_prev(&mas, 0x1600);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x1501);
> > + MAS_BUG_ON(&mas, mas.last != 0x1FFF);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* prev: active ->active, continue*/
> > + entry = mas_prev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find: start ->active */
> > + mas_set(&mas, 0);
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find: pause ->active */
> > + mas_set(&mas, 0);
> > + mas_pause(&mas);
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find: start ->active on value */;
> > + mas_set(&mas, 1200);
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find:active ->active */
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != ptr2);
> > + MAS_BUG_ON(&mas, mas.index != 0x2000);
> > + MAS_BUG_ON(&mas, mas.last != 0x2500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > +
> > + /* find:active -> active (NULL)*/
> > + entry = mas_find(&mas, 0x2700);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x2501);
> > + MAS_BUG_ON(&mas, mas.last != 0x2FFF);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find: none ->active */
> > + entry = mas_find(&mas, 0x5000);
> > + MAS_BUG_ON(&mas, entry != ptr3);
> > + MAS_BUG_ON(&mas, mas.index != 0x3000);
> > + MAS_BUG_ON(&mas, mas.last != 0x3500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find:active -> active (NULL) end*/
> > + entry = mas_find(&mas, ULONG_MAX);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x3501);
> > + MAS_BUG_ON(&mas, mas.last != ULONG_MAX);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find_rev: active (END) ->active */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr3);
> > + MAS_BUG_ON(&mas, mas.index != 0x3000);
> > + MAS_BUG_ON(&mas, mas.last != 0x3500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find_rev:active ->active */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr2);
> > + MAS_BUG_ON(&mas, mas.index != 0x2000);
> > + MAS_BUG_ON(&mas, mas.last != 0x2500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find_rev: pause ->active */
> > + mas_pause(&mas);
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find_rev:active -> active */
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0);
> > + MAS_BUG_ON(&mas, mas.last != 0x0FFF);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* find_rev: start ->active */
> > + mas_set(&mas, 0x1200);
> > + entry = mas_find_rev(&mas, 0);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk start ->active */
> > + mas_set(&mas, 0x1200);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk start ->active */
> > + mas_set(&mas, 0x1600);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x1501);
> > + MAS_BUG_ON(&mas, mas.last != 0x1fff);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk pause ->active */
> > + mas_set(&mas, 0x1200);
> > + mas_pause(&mas);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk pause -> active */
> > + mas_set(&mas, 0x1600);
> > + mas_pause(&mas);
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x1501);
> > + MAS_BUG_ON(&mas, mas.last != 0x1fff);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk none -> active */
> > + mas_set(&mas, 0x1200);
> > + mas.node = MAS_NONE;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk none -> active */
> > + mas_set(&mas, 0x1600);
> > + mas.node = MAS_NONE;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x1501);
> > + MAS_BUG_ON(&mas, mas.last != 0x1fff);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk active -> active */
> > + mas.index = 0x1200;
> > + mas.last = 0x1200;
> > + mas.offset = 0;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != ptr);
> > + MAS_BUG_ON(&mas, mas.index != 0x1000);
> > + MAS_BUG_ON(&mas, mas.last != 0x1500);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + /* mas_walk active -> active */
> > + mas.index = 0x1600;
> > + mas.last = 0x1600;
> > + entry = mas_walk(&mas);
> > + MAS_BUG_ON(&mas, entry != NULL);
> > + MAS_BUG_ON(&mas, mas.index != 0x1501);
> > + MAS_BUG_ON(&mas, mas.last != 0x1fff);
> > + MAS_BUG_ON(&mas, !mas_active(mas));
> > +
> > + mas_unlock(&mas);
> > +}
> > +
> > static DEFINE_MTREE(tree);
> > static int __init maple_tree_seed(void)
> > {
> > @@ -2979,6 +3604,10 @@ 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
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