[PATCH v2 02/35] lib/find: add test for atomic find_bit() ops

[Yury Norov <yury.norov@xxxxxxxxx>]

Add basic functionality test for new API.

Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
 lib/test_bitmap.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 65f22c2578b0..277e1ca9fd28 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -221,6 +221,65 @@ static void __init test_zero_clear(void)
 	expect_eq_pbl("", bmap, 1024);
 }
 
+static void __init test_find_and_bit(void)
+{
+	unsigned long w, w_part, bit, cnt = 0;
+	DECLARE_BITMAP(bmap, EXP1_IN_BITS);
+
+	/*
+	 * Test find_and_clear{_next}_bit() and corresponding
+	 * iterators
+	 */
+	bitmap_copy(bmap, exp1, EXP1_IN_BITS);
+	w = bitmap_weight(bmap, EXP1_IN_BITS);
+
+	for_each_test_and_clear_bit(bit, bmap, EXP1_IN_BITS)
+		cnt++;
+
+	expect_eq_uint(w, cnt);
+	expect_eq_uint(0, bitmap_weight(bmap, EXP1_IN_BITS));
+
+	bitmap_copy(bmap, exp1, EXP1_IN_BITS);
+	w = bitmap_weight(bmap, EXP1_IN_BITS);
+	w_part = bitmap_weight(bmap, EXP1_IN_BITS / 3);
+
+	cnt = 0;
+	bit = EXP1_IN_BITS / 3;
+	for_each_test_and_clear_bit_from(bit, bmap, EXP1_IN_BITS)
+		cnt++;
+
+	expect_eq_uint(bitmap_weight(bmap, EXP1_IN_BITS), bitmap_weight(bmap, EXP1_IN_BITS / 3));
+	expect_eq_uint(w_part, bitmap_weight(bmap, EXP1_IN_BITS));
+	expect_eq_uint(w - w_part, cnt);
+
+	/*
+	 * Test find_and_set{_next}_bit() and corresponding
+	 * iterators
+	 */
+	bitmap_copy(bmap, exp1, EXP1_IN_BITS);
+	w = bitmap_weight(bmap, EXP1_IN_BITS);
+	cnt = 0;
+
+	for_each_test_and_set_bit(bit, bmap, EXP1_IN_BITS)
+		cnt++;
+
+	expect_eq_uint(EXP1_IN_BITS - w, cnt);
+	expect_eq_uint(EXP1_IN_BITS, bitmap_weight(bmap, EXP1_IN_BITS));
+
+	bitmap_copy(bmap, exp1, EXP1_IN_BITS);
+	w = bitmap_weight(bmap, EXP1_IN_BITS);
+	w_part = bitmap_weight(bmap, EXP1_IN_BITS / 3);
+	cnt = 0;
+
+	bit = EXP1_IN_BITS / 3;
+	for_each_test_and_set_bit_from(bit, bmap, EXP1_IN_BITS)
+		cnt++;
+
+	expect_eq_uint(EXP1_IN_BITS - bitmap_weight(bmap, EXP1_IN_BITS),
+			EXP1_IN_BITS / 3 - bitmap_weight(bmap, EXP1_IN_BITS / 3));
+	expect_eq_uint(EXP1_IN_BITS * 2 / 3 - (w - w_part), cnt);
+}
+
 static void __init test_find_nth_bit(void)
 {
 	unsigned long b, bit, cnt = 0;
@@ -1273,6 +1332,8 @@ static void __init selftest(void)
 	test_for_each_clear_bitrange_from();
 	test_for_each_set_clump8();
 	test_for_each_set_bit_wrap();
+
+	test_find_and_bit();
 }
 
 KSTM_MODULE_LOADERS(test_bitmap);
-- 
2.40.1