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" interacting with commit ed2ffc74eee8 ("nsfs: Add a show_path method to fix mountinfo") from the userns tree. I added this patch: From: Stephen Rothwell Date: Thu, 25 Jun 2015 17:41:14 +1000 Subject: [PATCH] nsfs: fix for seq_printf() API change Signed-off-by: Stephen Rothwell --- fs/nsfs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nsfs.c b/fs/nsfs.c index e4905fbf3396..8f20d6016e20 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -142,7 +142,8 @@ static int nsfs_show_path(struct seq_file *seq, struct dentry *dentry) 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 = { -- 2.1.4 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/