linux-kernel - linux-next: build failure after merge of the device-mapper tree

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Message-Id: <20131105135128.496b8b2f599d11f2d30ad70c@canb.auug.org.au>
Date:	Tue, 5 Nov 2013 13:51:28 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Alasdair G Kergon <agk@...hat.com>,
	Mike Snitzer <snitzer@...hat.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Kent Overstreet <kmo@...erainc.com>,
	Jens Axboe <axboe@...nel.dk>, Joe Thornber <ejt@...hat.com>
Subject: linux-next: build failure after merge of the device-mapper tree

Hi all,

After merging the device-mapper tree, today's linux-next build (x86_64
allmodconfig) failed like this:

drivers/md/dm-cache-target.c: In function 'bio_writes_complete_block':
drivers/md/dm-cache-target.c:1020:7: error: 'struct bio' has no member named 'bi_size'
   (bio->bi_size == (cache->sectors_per_block << SECTOR_SHIFT));
       ^

Caused by commit 1bd270d800ec ("dm cache: promotion optimisation for
writes") interacting with commit ed2d2f9a8265 ("block: Abstract out bvec
iterator") from the block tree.

I applied this fix up patch and can carry it as necessary:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 5 Nov 2013 13:49:25 +1100
Subject: [PATCH] dm_cache: fix up for bvec iterator abstraction

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 drivers/md/dm-cache-target.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index a977d5c6d544..5ce0f5ec6d74 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -1017,7 +1017,7 @@ static void issue_overwrite(struct dm_cache_migration *mg, struct bio *bio)
 static bool bio_writes_complete_block(struct cache *cache, struct bio *bio)
 {
 	return (bio_data_dir(bio) == WRITE) &&
-		(bio->bi_size == (cache->sectors_per_block << SECTOR_SHIFT));
+		(bio->bi_iter.bi_size == (cache->sectors_per_block << SECTOR_SHIFT));
 }
 
 static void avoid_copy(struct dm_cache_migration *mg)
-- 
1.8.4.rc3

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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