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/ntfs/inode.c b/fs/ntfs/inode.c
index 1371487..97e2dac 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -612,7 +612,7 @@
 	 * might be tricky due to vfs interactions. Need to think about this
 	 * some more when implementing the unlink command.
 	 */
-	vi->i_nlink = le16_to_cpu(m->link_count);
+	set_nlink(vi, le16_to_cpu(m->link_count));
 	/*
 	 * FIXME: Reparse points can have the directory bit set even though
 	 * they would be S_IFLNK. Need to deal with this further below when we
@@ -634,7 +634,7 @@
 		vi->i_mode &= ~vol->dmask;
 		/* Things break without this kludge! */
 		if (vi->i_nlink > 1)
-			vi->i_nlink = 1;
+			set_nlink(vi, 1);
 	} else {
 		vi->i_mode |= S_IFREG;
 		/* Apply the file permissions mask set in the mount options. */
@@ -1242,7 +1242,7 @@
 	vi->i_version	= base_vi->i_version;
 	vi->i_uid	= base_vi->i_uid;
 	vi->i_gid	= base_vi->i_gid;
-	vi->i_nlink	= base_vi->i_nlink;
+	set_nlink(vi, base_vi->i_nlink);
 	vi->i_mtime	= base_vi->i_mtime;
 	vi->i_ctime	= base_vi->i_ctime;
 	vi->i_atime	= base_vi->i_atime;
@@ -1508,7 +1508,7 @@
 	vi->i_version	= base_vi->i_version;
 	vi->i_uid	= base_vi->i_uid;
 	vi->i_gid	= base_vi->i_gid;
-	vi->i_nlink	= base_vi->i_nlink;
+	set_nlink(vi, base_vi->i_nlink);
 	vi->i_mtime	= base_vi->i_mtime;
 	vi->i_ctime	= base_vi->i_ctime;
 	vi->i_atime	= base_vi->i_atime;