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-rw-r--r--lib/test_bitmap.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 25967cfa4ab2..98754ff9fe68 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -604,6 +604,12 @@ static void __init test_bitmap_arr64(void)
pr_err("bitmap_copy_arr64(nbits == %d:"
" tail is not safely cleared: %d\n", nbits, next_bit);
+ if ((nbits % 64) &&
+ (arr[(nbits - 1) / 64] & ~GENMASK_ULL((nbits - 1) % 64, 0)))
+ pr_err("bitmap_to_arr64(nbits == %d): tail is not safely cleared: 0x%016llx (must be 0x%016llx)\n",
+ nbits, arr[(nbits - 1) / 64],
+ GENMASK_ULL((nbits - 1) % 64, 0));
+
if (nbits < EXP1_IN_BITS - 64)
expect_eq_uint(arr[DIV_ROUND_UP(nbits, 64)], 0xa5a5a5a5);
}