add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/rose/rose_in.c
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@@ -1,8 +1,5 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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  *
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  * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
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  *
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@@ -219,7 +216,7 @@
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 	switch (frametype) {
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 	case ROSE_RESET_REQUEST:
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 		rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
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-		/* fall through */
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+		fallthrough;
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 	case ROSE_RESET_CONFIRMATION:
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 		rose_stop_timer(sk);
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 		rose_start_idletimer(sk);