Actually, given your: count = bv.bv_len / sizeof(uint64_t); My immediate concern was it would've truncated any partial contents of the bio_vec beyond the last uint64_t boundary. Leading to possible false positive return from the function (because some contents weren't checked).
Understood. I had always thought bio data was block-size aligned. Out of curiosity, do you have examples of when this is not so?
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