filesystems: add set_nlink()

Replace remaining direct i_nlink updates with a new set_nlink()
updater function.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 1d1358e..6e73f1d 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1236,6 +1236,7 @@
 	int offset;
 	struct udf_sb_info *sbi = UDF_SB(inode->i_sb);
 	struct udf_inode_info *iinfo = UDF_I(inode);
+	unsigned int link_count;
 
 	fe = (struct fileEntry *)bh->b_data;
 	efe = (struct extendedFileEntry *)bh->b_data;
@@ -1318,9 +1319,10 @@
 	inode->i_mode &= ~sbi->s_umask;
 	read_unlock(&sbi->s_cred_lock);
 
-	inode->i_nlink = le16_to_cpu(fe->fileLinkCount);
-	if (!inode->i_nlink)
-		inode->i_nlink = 1;
+	link_count = le16_to_cpu(fe->fileLinkCount);
+	if (!link_count)
+		link_count = 1;
+	set_nlink(inode, link_count);
 
 	inode->i_size = le64_to_cpu(fe->informationLength);
 	iinfo->i_lenExtents = inode->i_size;