openwrtv4/target/linux/generic/patches-4.0/503-yaffs-3.12-convert-readdir-to-iterate.patch

--- a/fs/yaffs2/yaffs_vfs.c
+++ b/fs/yaffs2/yaffs_vfs.c
@@ -1701,6 +1701,110 @@ static void yaffs_remove_obj_callback(st
 
 /*-----------------------------------------------------------------*/
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
+static int yaffs_readdir(struct file *file, struct dir_context *ctx)
+{
+	struct yaffs_obj *obj;
+	struct yaffs_dev *dev;
+	struct yaffs_search_context *sc;
+	struct inode *inode = file->f_dentry->d_inode;
+	unsigned long offset, curoffs;
+	struct yaffs_obj *l;
+	int ret_val = 0;
+
+	char name[YAFFS_MAX_NAME_LENGTH + 1];
+
+	obj = yaffs_dentry_to_obj(file->f_dentry);
+	dev = obj->my_dev;
+
+	yaffs_gross_lock(dev);
+
+	yaffs_dev_to_lc(dev)->readdir_process = current;
+
+	offset = ctx->pos;
+
+	sc = yaffs_new_search(obj);
+	if (!sc) {
+		ret_val = -ENOMEM;
+		goto out;
+	}
+
+	yaffs_trace(YAFFS_TRACE_OS,
+		"yaffs_readdir: starting at %d", (int)offset);
+
+	if (offset == 0) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_readdir: entry . ino %d",
+			(int)inode->i_ino);
+		yaffs_gross_unlock(dev);
+		if (!dir_emit_dot(file, ctx)) {
+			yaffs_gross_lock(dev);
+			goto out;
+		}
+		yaffs_gross_lock(dev);
+		offset++;
+		ctx->pos++;
+	}
+	if (offset == 1) {
+		yaffs_trace(YAFFS_TRACE_OS,
+			"yaffs_readdir: entry .. ino %d",
+			(int)file->f_dentry->d_parent->d_inode->i_ino);
+		yaffs_gross_unlock(dev);
+		if (!dir_emit_dotdot(file, ctx)) {
+			yaffs_gross_lock(dev);
+			goto out;
+		}
+		yaffs_gross_lock(dev);
+		offset++;
+		ctx->pos++;
+	}
+
+	curoffs = 1;
+
+	/* If the directory has changed since the open or last call to
+	   readdir, rewind to after the 2 canned entries. */
+	if (file->f_version != inode->i_version) {
+		offset = 2;
+		ctx->pos = offset;
+		file->f_version = inode->i_version;
+	}
+
+	while (sc->next_return) {
+		curoffs++;
+		l = sc->next_return;
+		if (curoffs >= offset) {
+			int this_inode = yaffs_get_obj_inode(l);
+			int this_type = yaffs_get_obj_type(l);
+
+			yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1);
+			yaffs_trace(YAFFS_TRACE_OS,
+				"yaffs_readdir: %s inode %d",
+				name, yaffs_get_obj_inode(l));
+
+			yaffs_gross_unlock(dev);
+
+			if (!dir_emit(ctx, name, strlen(name),
+				      this_inode, this_type) < 0) {
+				yaffs_gross_lock(dev);
+				goto out;
+			}
+
+			yaffs_gross_lock(dev);
+
+			offset++;
+			ctx->pos++;
+		}
+		yaffs_search_advance(sc);
+	}
+
+out:
+	yaffs_search_end(sc);
+	yaffs_dev_to_lc(dev)->readdir_process = NULL;
+	yaffs_gross_unlock(dev);
+
+	return ret_val;
+}
+#else
 static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 {
 	struct yaffs_obj *obj;
@@ -1807,10 +1911,15 @@ out:
 
 	return ret_val;
 }
+#endif
 
 static const struct file_operations yaffs_dir_operations = {
 	.read = generic_read_dir,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 12, 0))
+	.iterate = yaffs_readdir,
+#else
 	.readdir = yaffs_readdir,
+#endif
 	.fsync = yaffs_sync_object,
 	.llseek = generic_file_llseek,
 };