ARCH_DMA_MINALIGN represents the minimum (static) alignment for safe DMA operations while ARCH_KMALLOC_MINALIGN is the minimum kmalloc() objects alignment. Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Alasdair Kergon <agk@xxxxxxxxxx> Cc: Mike Snitzer <snitzer@xxxxxxxxxx> --- This is somewhat related to the previous crypto patch. The dm_crypt_io structure is supposed to be CRYPTO_MINALIGN-aligned. drivers/md/dm-crypt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 159c6806c19b..4f1bd5b348c3 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -3250,7 +3250,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv) cc->per_bio_data_size = ti->per_io_data_size = ALIGN(sizeof(struct dm_crypt_io) + cc->dmreq_start + additional_req_size, - ARCH_KMALLOC_MINALIGN); + ARCH_DMA_MINALIGN); ret = mempool_init(&cc->page_pool, BIO_MAX_VECS, crypt_page_alloc, crypt_page_free, cc); if (ret) {