[PATCH v4 2/8] bitmap: add test for bitmap_*_region() functions

From: Yury Norov
Date: Mon Aug 28 2023 - 22:40:25 EST


Test basic functionality of bitmap_{allocate,release,find_free}_region()
functions.

CC: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
CC: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Yury Norov <yury.norov@xxxxxxxxx>
---
lib/test_bitmap.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index f2ea9f30c7c5..65f22c2578b0 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -330,6 +330,29 @@ static void __init test_copy(void)
expect_eq_pbl("0-108,128-1023", bmap2, 1024);
}

+static void __init test_bitmap_region(void)
+{
+ int pos, order;
+
+ DECLARE_BITMAP(bmap, 1000);
+
+ bitmap_zero(bmap, 1000);
+
+ for (order = 0; order < 10; order++) {
+ pos = bitmap_find_free_region(bmap, 1000, order);
+ if (order == 0)
+ expect_eq_uint(pos, 0);
+ else
+ expect_eq_uint(pos, order < 9 ? BIT(order) : -ENOMEM);
+ }
+
+ bitmap_release_region(bmap, 0, 0);
+ for (order = 1; order < 9; order++)
+ bitmap_release_region(bmap, BIT(order), order);
+
+ expect_eq_uint(bitmap_weight(bmap, 1000), 0);
+}
+
#define EXP2_IN_BITS (sizeof(exp2) * 8)

static void __init test_replace(void)
@@ -1227,6 +1250,7 @@ static void __init selftest(void)
test_zero_clear();
test_fill_set();
test_copy();
+ test_bitmap_region();
test_replace();
test_bitmap_arr32();
test_bitmap_arr64();
--
2.39.2