kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/arch/riscv/lib/delay.c
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@@ -1,14 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (C) 2012 Regents of the University of California
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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
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- *   as published by the Free Software Foundation, version 2.
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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/delay.h>
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@@ -89,9 +81,13 @@
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 void udelay(unsigned long usecs)
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 {
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 	u64 ucycles = (u64)usecs * lpj_fine * UDELAY_MULT;
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+	u64 n;
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 	if (unlikely(usecs > MAX_UDELAY_US)) {
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-		__delay((u64)usecs * riscv_timebase / 1000000ULL);
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+		n = (u64)usecs * riscv_timebase;
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+		do_div(n, 1000000);
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+
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+		__delay(n);
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 		return;
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 	}
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