[PATCH 16/60] block: pktcdvd: comment on direct access to bvec table

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Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
 drivers/block/pktcdvd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 90fa4ac149db..817d2cc17d01 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1298,6 +1298,11 @@ static int pkt_handle_queue(struct pktcdvd_device *pd)
 static void pkt_start_write(struct pktcdvd_device *pd, struct packet_data *pkt)
 {
 	int f;
+
+	/*
+	 * Need to fix this usage for supporting multipage bvecs,
+	 * because the table can be changed in pkt_make_local_copy().
+	 */
 	struct bio_vec *bvec = pkt->w_bio->bi_io_vec;
 
 	bio_reset(pkt->w_bio);
-- 
2.7.4

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