Merge branch 'next' into for-linus

Prepare input updates for 6.4 merge window.

1 files changed, 161 insertions, 0 deletions

diff --git a/lib/test_maple_tree.c b/lib/test_maple_tree.c
index 497fc93ccf9e..3d19b1f78d71 100644
--- a/lib/test_maple_tree.c
+++ b/lib/test_maple_tree.c
@@ -1709,6 +1709,74 @@ static noinline void check_forking(struct maple_tree *mt)
 	mtree_destroy(&newmt);
 }
 
+static noinline void check_iteration(struct maple_tree *mt)
+{
+	int i, nr_entries = 125;
+	void *val;
+	MA_STATE(mas, mt, 0, 0);
+
+	for (i = 0; i <= nr_entries; i++)
+		mtree_store_range(mt, i * 10, i * 10 + 9,
+				  xa_mk_value(i), GFP_KERNEL);
+
+	mt_set_non_kernel(99999);
+
+	i = 0;
+	mas_lock(&mas);
+	mas_for_each(&mas, val, 925) {
+		MT_BUG_ON(mt, mas.index != i * 10);
+		MT_BUG_ON(mt, mas.last != i * 10 + 9);
+		/* Overwrite end of entry 92 */
+		if (i == 92) {
+			mas.index = 925;
+			mas.last = 929;
+			mas_store(&mas, val);
+		}
+		i++;
+	}
+	/* Ensure mas_find() gets the next value */
+	val = mas_find(&mas, ULONG_MAX);
+	MT_BUG_ON(mt, val != xa_mk_value(i));
+
+	mas_set(&mas, 0);
+	i = 0;
+	mas_for_each(&mas, val, 785) {
+		MT_BUG_ON(mt, mas.index != i * 10);
+		MT_BUG_ON(mt, mas.last != i * 10 + 9);
+		/* Overwrite start of entry 78 */
+		if (i == 78) {
+			mas.index = 780;
+			mas.last = 785;
+			mas_store(&mas, val);
+		} else {
+			i++;
+		}
+	}
+	val = mas_find(&mas, ULONG_MAX);
+	MT_BUG_ON(mt, val != xa_mk_value(i));
+
+	mas_set(&mas, 0);
+	i = 0;
+	mas_for_each(&mas, val, 765) {
+		MT_BUG_ON(mt, mas.index != i * 10);
+		MT_BUG_ON(mt, mas.last != i * 10 + 9);
+		/* Overwrite end of entry 76 and advance to the end */
+		if (i == 76) {
+			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);
+	MT_BUG_ON(mt, val != xa_mk_value(76));
+	mas_unlock(&mas);
+	mas_destroy(&mas);
+	mt_set_non_kernel(0);
+}
+
 static noinline void check_mas_store_gfp(struct maple_tree *mt)
 {
 
@@ -2517,6 +2585,91 @@ static noinline void check_bnode_min_spanning(struct maple_tree *mt)
 	mt_set_non_kernel(0);
 }
 
+static noinline void check_empty_area_window(struct maple_tree *mt)
+{
+	unsigned long i, nr_entries = 20;
+	MA_STATE(mas, mt, 0, 0);
+
+	for (i = 1; i <= nr_entries; i++)
+		mtree_store_range(mt, i*10, i*10 + 9,
+				  xa_mk_value(i), GFP_KERNEL);
+
+	/* Create another hole besides the one at 0 */
+	mtree_store_range(mt, 160, 169, NULL, GFP_KERNEL);
+
+	/* Check lower bounds that don't fit */
+	rcu_read_lock();
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 5, 90, 10) != -EBUSY);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 6, 90, 5) != -EBUSY);
+
+	/* Check lower bound that does fit */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 5, 90, 5) != 0);
+	MT_BUG_ON(mt, mas.index != 5);
+	MT_BUG_ON(mt, mas.last != 9);
+	rcu_read_unlock();
+
+	/* Check one gap that doesn't fit and one that does */
+	rcu_read_lock();
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 5, 217, 9) != 0);
+	MT_BUG_ON(mt, mas.index != 161);
+	MT_BUG_ON(mt, mas.last != 169);
+
+	/* Check one gap that does fit above the min */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 100, 218, 3) != 0);
+	MT_BUG_ON(mt, mas.index != 216);
+	MT_BUG_ON(mt, mas.last != 218);
+
+	/* Check size that doesn't fit any gap */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 100, 218, 16) != -EBUSY);
+
+	/*
+	 * Check size that doesn't fit the lower end of the window but
+	 * does fit the gap
+	 */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 167, 200, 4) != -EBUSY);
+
+	/*
+	 * Check size that doesn't fit the upper end of the window but
+	 * does fit the gap
+	 */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area_rev(&mas, 100, 162, 4) != -EBUSY);
+
+	/* Check mas_empty_area forward */
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 0, 100, 9) != 0);
+	MT_BUG_ON(mt, mas.index != 0);
+	MT_BUG_ON(mt, mas.last != 8);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 0, 100, 4) != 0);
+	MT_BUG_ON(mt, mas.index != 0);
+	MT_BUG_ON(mt, mas.last != 3);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 0, 100, 11) != -EBUSY);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 5, 100, 6) != -EBUSY);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 0, 8, 10) != -EBUSY);
+
+	mas_reset(&mas);
+	mas_empty_area(&mas, 100, 165, 3);
+
+	mas_reset(&mas);
+	MT_BUG_ON(mt, mas_empty_area(&mas, 100, 163, 6) != -EBUSY);
+	rcu_read_unlock();
+}
+
 static DEFINE_MTREE(tree);
 static int maple_tree_seed(void)
 {
@@ -2575,6 +2728,10 @@ static int maple_tree_seed(void)
 #endif
 
 	mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
+	check_iteration(&tree);
+	mtree_destroy(&tree);
+
+	mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
 	check_forking(&tree);
 	mtree_destroy(&tree);
 
@@ -2765,6 +2922,10 @@ static int maple_tree_seed(void)
 	check_bnode_min_spanning(&tree);
 	mtree_destroy(&tree);
 
+	mt_init_flags(&tree, MT_FLAGS_ALLOC_RANGE);
+	check_empty_area_window(&tree);
+	mtree_destroy(&tree);
+
 #if defined(BENCH)
 skip:
 #endif