iget: stop FAT from using iget() and read_inode()

Stop the FAT filesystem from using iget() and read_inode().  Replace the call
to iget() with a call to ilookup().

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/fat/inode.c

@@ -634,8 +634,6 @@ static const struct super_operations fat_sops = {
 	.clear_inode	= fat_clear_inode,
 	.remount_fs	= fat_remount,
 
-	.read_inode	= make_bad_inode,
-
 	.show_options	= fat_show_options,
 };
 
@@ -663,8 +661,8 @@ static struct dentry *fat_fh_to_dentry(struct super_block *sb,
 	if (fh_len < 5 || fh_type != 3)
 		return NULL;
 
-	inode = iget(sb, fh[0]);
-	if (!inode || is_bad_inode(inode) || inode->i_generation != fh[1]) {
+	inode = ilookup(sb, fh[0]);
+	if (!inode || inode->i_generation != fh[1]) {
 		if (inode)
 			iput(inode);
 		inode = NULL;