lib/bitmap: add test for bitmap_{from,to}_arr64

Test newly added bitmap_{from,to}_arr64() functions similarly to
already existing bitmap_{from,to}_arr32() tests.

CC: Alexander Gordeev <agordeev@linux.ibm.com>
CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Christian Borntraeger <borntraeger@linux.ibm.com>
CC: Claudio Imbrenda <imbrenda@linux.ibm.com>
CC: David Hildenbrand <david@redhat.com>
CC: Heiko Carstens <hca@linux.ibm.com>
CC: Janosch Frank <frankja@linux.ibm.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
CC: Sven Schnelle <svens@linux.ibm.com>
CC: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>

diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 0c82f07f74fcba6ae31ea7603da7c57a111339ad..d5923a640457d01a40fba3cc9d1daf31a928e765 100644 (file)
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -585,6 +585,30 @@ static void __init test_bitmap_arr32(void)
        }
 }
 
+static void __init test_bitmap_arr64(void)
+{
+       unsigned int nbits, next_bit;
+       u64 arr[EXP1_IN_BITS / 64];
+       DECLARE_BITMAP(bmap2, EXP1_IN_BITS);
+
+       memset(arr, 0xa5, sizeof(arr));
+
+       for (nbits = 0; nbits < EXP1_IN_BITS; ++nbits) {
+               memset(bmap2, 0xff, sizeof(arr));
+               bitmap_to_arr64(arr, exp1, nbits);
+               bitmap_from_arr64(bmap2, arr, nbits);
+               expect_eq_bitmap(bmap2, exp1, nbits);
+
+               next_bit = find_next_bit(bmap2, round_up(nbits, BITS_PER_LONG), nbits);
+               if (next_bit < round_up(nbits, BITS_PER_LONG))
+                       pr_err("bitmap_copy_arr64(nbits == %d:"
+                               " tail is not safely cleared: %d\n", nbits, next_bit);
+
+               if (nbits < EXP1_IN_BITS - 64)
+                       expect_eq_uint(arr[DIV_ROUND_UP(nbits, 64)], 0xa5a5a5a5);
+       }
+}
+
 static void noinline __init test_mem_optimisations(void)
 {
        DECLARE_BITMAP(bmap1, 1024);
@@ -852,6 +876,7 @@ static void __init selftest(void)
        test_copy();
        test_replace();
        test_bitmap_arr32();
+       test_bitmap_arr64();
        test_bitmap_parse();
        test_bitmap_parselist();
        test_bitmap_printlist();