linux-kernel - [PATCH v1 01/54] block: drbd: comment on direct access bvec table

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Message-Id: <1482854250-13481-2-git-send-email-tom.leiming@gmail.com>
Date:   Tue, 27 Dec 2016 23:55:50 +0800
From:   Ming Lei <tom.leiming@...il.com>
To:     Jens Axboe <axboe@...com>, linux-kernel@...r.kernel.org
Cc:     linux-block@...r.kernel.org, Christoph Hellwig <hch@...radead.org>,
        Ming Lei <tom.leiming@...il.com>,
        Philipp Reisner <philipp.reisner@...bit.com>,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        drbd-dev@...ts.linbit.com (open list:DRBD DRIVER)
Subject: [PATCH v1 01/54] block: drbd: comment on direct access bvec table

Signed-off-by: Ming Lei <tom.leiming@...il.com>
---
 drivers/block/drbd/drbd_bitmap.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index ab62b81c2ca7..ce9506da30ad 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -953,6 +953,7 @@ static void drbd_bm_endio(struct bio *bio)
 	struct drbd_bm_aio_ctx *ctx = bio->bi_private;
 	struct drbd_device *device = ctx->device;
 	struct drbd_bitmap *b = device->bitmap;
+	/* single page bio, safe for multipage bvec */
 	unsigned int idx = bm_page_to_idx(bio->bi_io_vec[0].bv_page);
 
 	if ((ctx->flags & BM_AIO_COPY_PAGES) == 0 &&
-- 
2.7.4