linux-kernel - [PATCH v1 2/4] bitmap: Add bitmap_fill()/bitmap

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Date:   Tue,  9 Jan 2018 19:24:28 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Randy Dunlap <rdunlap@...radead.org>,
        Yury Norov <ynorov@...iumnetworks.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 2/4] bitmap: Add bitmap_fill()/bitmap_set() test cases

Explicitly test bitmap_fill() and bitmap_set() functions.

For bitmap_fill() we expect a consistent behaviour as in bitmap_zero(),
i.e.  the trailing bits will be set up to unsigned long boundary.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 lib/test_bitmap.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 9734af711816..6889fcc0e1f4 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -134,6 +134,35 @@ static void __init test_zero_clear(void)
 	expect_eq_pbl("", bmap, 1024);
 }
 
+static void __init test_fill_set(void)
+{
+	DECLARE_BITMAP(bmap, 1024);
+
+	/* Known way to clear all bits */
+	memset(bmap, 0x00, 128);
+
+	expect_eq_pbl("", bmap, 23);
+	expect_eq_pbl("", bmap, 1024);
+
+	/* single-word bitmaps */
+	bitmap_set(bmap, 0, 9);
+	expect_eq_pbl("0-8", bmap, 1024);
+
+	bitmap_fill(bmap, 35);
+	expect_eq_pbl("0-63", bmap, 1024);
+
+	/* cross boundaries operations */
+	bitmap_set(bmap, 79, 19);
+	expect_eq_pbl("0-63,79-97", bmap, 1024);
+
+	bitmap_fill(bmap, 115);
+	expect_eq_pbl("0-127", bmap, 1024);
+
+	/* Zeroing entire area */
+	bitmap_fill(bmap, 1024);
+	expect_eq_pbl("0-1023", bmap, 1024);
+}
+
 static void __init test_zero_fill_copy(void)
 {
 	DECLARE_BITMAP(bmap1, 1024);
@@ -339,6 +368,7 @@ static void noinline __init test_mem_optimisations(void)
 static int __init test_bitmap_init(void)
 {
 	test_zero_clear();
+	test_fill_set();
 	test_zero_fill_copy();
 	test_bitmap_arr32();
 	test_bitmap_parselist();
-- 
2.15.1