add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/m68k/include/asm/timex.h
..
..
@@ -35,7 +35,7 @@
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 {
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 	if (mach_random_get_entropy)
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 		return mach_random_get_entropy();
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-	return 0;
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+	return random_get_entropy_fallback();
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 }
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 #define random_get_entropy	random_get_entropy
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