From 2c523550b9924f98299414253d8a1fef7c60ef2d Mon Sep 17 00:00:00 2001 From: Yury Norov Date: Thu, 28 Apr 2022 13:51:14 -0700 Subject: [PATCH] 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 CC: Andy Shevchenko CC: Christian Borntraeger CC: Claudio Imbrenda CC: David Hildenbrand CC: Heiko Carstens CC: Janosch Frank CC: Rasmus Villemoes CC: Sven Schnelle CC: Vasily Gorbik Signed-off-by: Yury Norov --- lib/test_bitmap.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) 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();