--- zzzz-none-000/linux-3.10.107/fs/romfs/super.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/romfs/super.c	2021-02-04 17:41:59.000000000 +0000
@@ -56,6 +56,8 @@
  * 2 of the Licence, or (at your option) any later version.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/module.h>
 #include <linux/string.h>
 #include <linux/fs.h>
@@ -145,19 +147,18 @@
 /*
  * read the entries from a directory
  */
-static int romfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+static int romfs_readdir(struct file *file, struct dir_context *ctx)
 {
-	struct inode *i = file_inode(filp);
+	struct inode *i = file_inode(file);
 	struct romfs_inode ri;
 	unsigned long offset, maxoff;
 	int j, ino, nextfh;
-	int stored = 0;
 	char fsname[ROMFS_MAXFN];	/* XXX dynamic? */
 	int ret;
 
 	maxoff = romfs_maxsize(i->i_sb);
 
-	offset = filp->f_pos;
+	offset = ctx->pos;
 	if (!offset) {
 		offset = i->i_ino & ROMFH_MASK;
 		ret = romfs_dev_read(i->i_sb, offset, &ri, ROMFH_SIZE);
@@ -170,10 +171,10 @@
 	for (;;) {
 		if (!offset || offset >= maxoff) {
 			offset = maxoff;
-			filp->f_pos = offset;
+			ctx->pos = offset;
 			goto out;
 		}
-		filp->f_pos = offset;
+		ctx->pos = offset;
 
 		/* Fetch inode info */
 		ret = romfs_dev_read(i->i_sb, offset, &ri, ROMFH_SIZE);
@@ -194,16 +195,14 @@
 		nextfh = be32_to_cpu(ri.next);
 		if ((nextfh & ROMFH_TYPE) == ROMFH_HRD)
 			ino = be32_to_cpu(ri.spec);
-		if (filldir(dirent, fsname, j, offset, ino,
-			    romfs_dtype_table[nextfh & ROMFH_TYPE]) < 0)
+		if (!dir_emit(ctx, fsname, j, ino,
+			    romfs_dtype_table[nextfh & ROMFH_TYPE]))
 			goto out;
 
-		stored++;
 		offset = nextfh & ROMFH_MASK;
 	}
-
 out:
-	return stored;
+	return 0;
 }
 
 /*
@@ -281,7 +280,7 @@
 
 static const struct file_operations romfs_dir_operations = {
 	.read		= generic_read_dir,
-	.readdir	= romfs_readdir,
+	.iterate	= romfs_readdir,
 	.llseek		= default_llseek,
 };
 
@@ -356,9 +355,6 @@
 	case ROMFH_REG:
 		i->i_fop = &romfs_ro_fops;
 		i->i_data.a_ops = &romfs_aops;
-		if (i->i_sb->s_mtd)
-			i->i_data.backing_dev_info =
-				i->i_sb->s_mtd->backing_dev_info;
 		if (nextfh & ROMFH_EXEC)
 			mode |= S_IXUGO;
 		break;
@@ -383,7 +379,7 @@
 eio:
 	ret = -EIO;
 error:
-	printk(KERN_ERR "ROMFS: read error for inode 0x%lx\n", pos);
+	pr_err("read error for inode 0x%lx\n", pos);
 	return ERR_PTR(ret);
 }
 
@@ -393,6 +389,7 @@
 static struct inode *romfs_alloc_inode(struct super_block *sb)
 {
 	struct romfs_inode_info *inode;
+
 	inode = kmem_cache_alloc(romfs_inode_cachep, GFP_KERNEL);
 	return inode ? &inode->vfs_inode : NULL;
 }
@@ -403,6 +400,7 @@
 static void romfs_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
+
 	kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
 }
 
@@ -435,6 +433,7 @@
  */
 static int romfs_remount(struct super_block *sb, int *flags, char *data)
 {
+	sync_filesystem(sb);
 	*flags |= MS_RDONLY;
 	return 0;
 }
@@ -509,15 +508,13 @@
 	if (rsb->word0 != ROMSB_WORD0 || rsb->word1 != ROMSB_WORD1 ||
 	    img_size < ROMFH_SIZE) {
 		if (!silent)
-			printk(KERN_WARNING "VFS:"
-			       " Can't find a romfs filesystem on dev %s.\n",
+			pr_warn("VFS: Can't find a romfs filesystem on dev %s.\n",
 			       sb->s_id);
 		goto error_rsb_inval;
 	}
 
 	if (romfs_checksum(rsb, min_t(size_t, img_size, 512))) {
-		printk(KERN_ERR "ROMFS: bad initial checksum on dev %s.\n",
-		       sb->s_id);
+		pr_err("bad initial checksum on dev %s.\n", sb->s_id);
 		goto error_rsb_inval;
 	}
 
@@ -525,8 +522,8 @@
 
 	len = strnlen(rsb->name, ROMFS_MAXFN);
 	if (!silent)
-		printk(KERN_NOTICE "ROMFS: Mounting image '%*.*s' through %s\n",
-		       (unsigned) len, (unsigned) len, rsb->name, storage);
+		pr_notice("Mounting image '%*.*s' through %s\n",
+			  (unsigned) len, (unsigned) len, rsb->name, storage);
 
 	kfree(rsb);
 	rsb = NULL;
@@ -536,16 +533,14 @@
 
 	root = romfs_iget(sb, pos);
 	if (IS_ERR(root))
-		goto error;
+		return PTR_ERR(root);
 
 	sb->s_root = d_make_root(root);
 	if (!sb->s_root)
-		goto error;
+		return -ENOMEM;
 
 	return 0;
 
-error:
-	return -EINVAL;
 error_rsb_inval:
 	ret = -EINVAL;
 error_rsb:
@@ -618,7 +613,7 @@
 {
 	int ret;
 
-	printk(KERN_INFO "ROMFS MTD (C) 2007 Red Hat, Inc.\n");
+	pr_info("ROMFS MTD (C) 2007 Red Hat, Inc.\n");
 
 	romfs_inode_cachep =
 		kmem_cache_create("romfs_i",
@@ -627,13 +622,12 @@
 				  romfs_i_init_once);
 
 	if (!romfs_inode_cachep) {
-		printk(KERN_ERR
-		       "ROMFS error: Failed to initialise inode cache\n");
+		pr_err("Failed to initialise inode cache\n");
 		return -ENOMEM;
 	}
 	ret = register_filesystem(&romfs_fs_type);
 	if (ret) {
-		printk(KERN_ERR "ROMFS error: Failed to register filesystem\n");
+		pr_err("Failed to register filesystem\n");
 		goto error_register;
 	}
 	return 0;