diff options
| -rw-r--r-- | lib/bitmap.c | 2 | ||||
| -rw-r--r-- | lib/test_bitmap.c | 57 |
2 files changed, 59 insertions, 0 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 9dc526507875..1b897f94e0ff 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -69,6 +69,7 @@ bool __bitmap_or_equal(const unsigned long *bitmap1, tmp = (bitmap1[k] | bitmap2[k]) ^ bitmap3[k]; return (tmp & BITMAP_LAST_WORD_MASK(bits)) == 0; } +EXPORT_SYMBOL(__bitmap_or_equal); void __bitmap_complement(unsigned long *dst, const unsigned long *src, unsigned int bits) { @@ -360,6 +361,7 @@ unsigned int __bitmap_weighted_or(unsigned long *dst, const unsigned long *bitma { return BITMAP_WEIGHT(({dst[idx] = bitmap1[idx] | bitmap2[idx]; dst[idx]; }), bits); } +EXPORT_SYMBOL(__bitmap_weighted_or); void __bitmap_set(unsigned long *map, unsigned int start, int len) { diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index b6f27c632c75..69813c10e6c0 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -1467,6 +1467,62 @@ static void __init test_bitmap_write_perf(void) pr_info("%s:\t\t%llu\n", __func__, time); } +/* + * nbits == 0 is most commonly not a valid case. Bitmap users should revisit + * the caller logic. Bitmap API doesn't provide any guarantees on returned + * value. The pointers are not dereferenced. The return value is intentionally + * ignored. + */ +static void __init test_zero_nbits(void) +{ + static volatile __always_used unsigned long ret __initdata; + + bitmap_clear(NULL, 0, 0); + bitmap_complement(NULL, NULL, 0); + bitmap_copy(NULL, NULL, 0); + bitmap_copy_clear_tail(NULL, NULL, 0); + bitmap_fill(NULL, 0); + bitmap_from_arr32(NULL, NULL, 0); + bitmap_from_arr64(NULL, NULL, 0); + bitmap_or(NULL, NULL, NULL, 0); + bitmap_set(NULL, 0, 0); + bitmap_shift_left(NULL, NULL, 0, 0); + bitmap_shift_right(NULL, NULL, 0, 0); + bitmap_to_arr32(NULL, NULL, 0); + bitmap_to_arr64(NULL, NULL, 0); + bitmap_write(NULL, 0, 0, 0); + bitmap_xor(NULL, NULL, NULL, 0); + bitmap_zero(NULL, 0); + + ret = bitmap_and(NULL, NULL, NULL, 0); + ret = bitmap_empty(NULL, 0); + ret = bitmap_equal(NULL, NULL, 0); + ret = bitmap_full(NULL, 0); + ret = bitmap_or_equal(NULL, NULL, NULL, 0); + ret = bitmap_read(NULL, 0, 0); + ret = bitmap_subset(NULL, NULL, 0); + ret = bitmap_weight(NULL, 0); + ret = bitmap_weight_and(NULL, NULL, 0); + ret = bitmap_weight_andnot(NULL, NULL, 0); + ret = bitmap_weight_from(NULL, 0, 0); + ret = bitmap_weighted_or(NULL, NULL, NULL, 0); + + ret = find_first_and_and_bit(NULL, NULL, NULL, 0); + ret = find_first_and_bit(NULL, NULL, 0); + ret = find_first_andnot_bit(NULL, NULL, 0); + ret = find_first_bit(NULL, 0); + ret = find_first_zero_bit(NULL, 0); + ret = find_last_bit(NULL, 0); + ret = find_next_and_bit(NULL, NULL, 0, 0); + ret = find_next_andnot_bit(NULL, NULL, 0, 0); + ret = find_next_bit(NULL, 0, 0); + ret = find_next_clump8(NULL, NULL, 0, 0); + ret = find_next_zero_bit(NULL, 0, 0); + ret = find_nth_and_bit(NULL, NULL, 0, 0); + ret = find_nth_bit(NULL, 0, 0); + ret = find_random_bit(NULL, 0); +} + #undef TEST_BIT_LEN static void __init selftest(void) @@ -1490,6 +1546,7 @@ static void __init selftest(void) test_bitmap_read_perf(); test_bitmap_weight(); test_bitmap_write_perf(); + test_zero_nbits(); test_find_nth_bit(); test_for_each_set_bit(); |