linux-kernel - [PATCH v4 2/8] bitmap: add test for bitmap_*

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 28 Aug 2023 19:39:05 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Yury Norov <yury.norov@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH v4 2/8] bitmap: add test for bitmap_*_region() functions

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

CC: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
CC: Rasmus Villemoes <linux@...musvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@...il.com>
---
 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