add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/watchdog/riowd.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* riowd.c - driver for hw watchdog inside Super I/O of RIO
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  *
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  * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net)
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@@ -76,7 +77,7 @@
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 static int riowd_open(struct inode *inode, struct file *filp)
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 {
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-	nonseekable_open(inode, filp);
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+	stream_open(inode, filp);
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 	return 0;
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 }
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@@ -133,14 +134,14 @@
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 			return -EINVAL;
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 		riowd_timeout = (new_margin + 59) / 60;
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 		riowd_writereg(p, riowd_timeout, WDTO_INDEX);
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-		/* Fall */
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+		fallthrough;
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 	case WDIOC_GETTIMEOUT:
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 		return put_user(riowd_timeout * 60, (int __user *)argp);
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 	default:
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 		return -EINVAL;
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-	};
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+	}
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 	return 0;
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 }
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@@ -162,6 +163,7 @@
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 	.owner =		THIS_MODULE,
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 	.llseek =		no_llseek,
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 	.unlocked_ioctl =	riowd_ioctl,
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+	.compat_ioctl	=	compat_ptr_ioctl,
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 	.open =			riowd_open,
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 	.write =		riowd_write,
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 	.release =		riowd_release,