add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/arch/um/drivers/cow_user.c
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@@ -1,6 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * Copyright (C) 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
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- * Licensed under the GPL
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  */
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 /*
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@@ -17,6 +17,7 @@
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 #define PATH_LEN_V1 256
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+/* unsigned time_t works until year 2106 */
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 typedef __u32 time32_t;
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 struct cow_header_v1 {
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@@ -197,7 +198,7 @@
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 		     int sectorsize, int alignment, unsigned long long *size)
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 {
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 	struct cow_header_v3 *header;
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-	unsigned long modtime;
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+	long long modtime;
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 	int err;
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 	err = cow_seek_file(fd, 0);
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@@ -276,7 +277,7 @@
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 int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
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 		    __u32 *version_out, char **backing_file_out,
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-		    time_t *mtime_out, unsigned long long *size_out,
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+		    long long *mtime_out, unsigned long long *size_out,
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 		    int *sectorsize_out, __u32 *align_out,
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 		    int *bitmap_offset_out)
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 {
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@@ -363,7 +364,7 @@
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 		/*
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 		 * this was used until Dec2005 - 64bits are needed to represent
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-		 * 2038+. I.e. we can safely do this truncating cast.
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+		 * 2106+. I.e. we can safely do this truncating cast.
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 		 *
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 		 * Additionally, we must use be32toh() instead of be64toh(), since
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 		 * the program used to use the former (tested - I got mtime