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

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Message-Id: <20130927113100.5c261c61856e26da4cf8f949@canb.auug.org.au>
Date:	Fri, 27 Sep 2013 11:31:00 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Sage Weil <sage@...dream.net>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	majianpeng <majianpeng@...il.com>, Zach Brown <zab@...bo.net>,
	Dave Kleikamp <dave.kleikamp@...cle.com>
Subject: linux-next: build failure after merge of the ceph tree

Hi Sage,

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

fs/ceph/file.c: In function 'ceph_sync_direct_write':
fs/ceph/file.c:545:24: error: 'struct iov_iter' has no member named 'iov'
   void __user *data = i.iov->iov_base + i.iov_offset;
                        ^
fs/ceph/file.c:546:14: error: 'struct iov_iter' has no member named 'iov'
   u64 len = i.iov->iov_len - i.iov_offset;
              ^

This also happened yesterday but was swamped by the other error (now fixed).

Caused by commit d4ce96db671b ("ceph: Implement writev/pwritev for sync
operation") interacting with commit f6794d33a5ec ("iov_iter: hide iovec
details behind ops function pointers") from the aio-direct tree.

I applied the following merge fix patch (but there may be a better
solution):

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Fri, 27 Sep 2013 11:28:05 +1000
Subject: [PATCH] ceph: fix up for iov_iter changes

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 fs/ceph/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 5cf034e..1216372 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -542,8 +542,8 @@ ceph_sync_direct_write(struct kiocb *iocb, const struct iovec *iov,
 	iov_iter_init(&i, iov, nr_segs, count, 0);
 
 	while (iov_iter_count(&i) > 0) {
-		void __user *data = i.iov->iov_base + i.iov_offset;
-		u64 len = i.iov->iov_len - i.iov_offset;
+		void __user *data = iov_iter_iovec(&i)->iov_base + i.iov_offset;
+		u64 len = iov_iter_iovec(&i)->iov_len - i.iov_offset;
 
 		page_align = (unsigned long)data & ~PAGE_MASK;
 
-- 
1.8.4.rc3

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

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