lib/test_bitmap.c: 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.

Link: http://lkml.kernel.org/r/20180109172430.87452-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Yury Norov <ynorov@caviumnetworks.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 30 insertions, 0 deletions

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();