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-rw-r--r--lib/test_bitmap.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 0c82f07f74fc..d5923a640457 100644
--- 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();