change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/lib/uuid.c
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@@ -1,17 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Unified UUID/GUID definition
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  *
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  * Copyright (C) 2009, 2016 Intel Corp.
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  *	Huang Ying <ying.huang@intel.com>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License version
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- * 2 as published by the Free Software Foundation;
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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 #include <linux/kernel.h>
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@@ -48,6 +40,16 @@
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 }
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 EXPORT_SYMBOL(generate_random_uuid);
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+void generate_random_guid(unsigned char guid[16])
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+{
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+	get_random_bytes(guid, 16);
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+	/* Set GUID version to 4 --- truly random generation */
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+	guid[7] = (guid[7] & 0x0F) | 0x40;
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+	/* Set the GUID variant to DCE */
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+	guid[8] = (guid[8] & 0x3F) | 0x80;
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+}
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+EXPORT_SYMBOL(generate_random_guid);
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+
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 static void __uuid_gen_common(__u8 b[16])
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 {
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 	prandom_bytes(b, 16);