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

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Date:	Tue, 14 Jul 2015 15:19:08 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Joe Perches <joe@...ches.com>,
	Al Viro <viro@...IV.linux.org.uk>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: linux-next: build failure after merge of the akpm tree

Hi Andrew,

After merging the akpm tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

fs/nsfs.c: In function 'nsfs_show_path':
fs/nsfs.c:145:2: error: void value not ignored as it ought to be
  return seq_printf(seq, "%s:[%lu]", ns_ops->name, inode->i_ino);
  ^
fs/nsfs.c:146:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Caused by patch

  "fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void"

from the akpm tree interacting with commit

  75509fd88fbd ("nsfs: Add a show_path method to fix mountinfo")

from the userns tree (which has reappeared).

I have applied the same fix patch from last time:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Subject: nsfs: fix for seq_printf() API change
Date: Thu, 25 Jun 2015 17:41:14 +1000

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Joe Perches <joe@...ches.com>
Cc: Al Viro <viro@...IV.linux.org.uk>
Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 fs/nsfs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN fs/nsfs.c~fs-seq_file-convert-int-seq_vprint-seq_printf-etc-returns-to-void-fix fs/nsfs.c
--- a/fs/nsfs.c~fs-seq_file-convert-int-seq_vprint-seq_printf-etc-returns-to-void-fix
+++ a/fs/nsfs.c
@@ -142,7 +142,8 @@ static int nsfs_show_path(struct seq_fil
 	struct inode *inode = d_inode(dentry);
 	const struct proc_ns_operations *ns_ops = dentry->d_fsdata;
 
-	return seq_printf(seq, "%s:[%lu]", ns_ops->name, inode->i_ino);
+	seq_printf(seq, "%s:[%lu]", ns_ops->name, inode->i_ino);
+	return 0;
 }
 
 static const struct super_operations nsfs_ops = {

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

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