diff options
Diffstat (limited to 'arch/riscv/lib/delay.c')
| -rw-r--r-- | arch/riscv/lib/delay.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/arch/riscv/lib/delay.c b/arch/riscv/lib/delay.c index dce8ae24c6d3..49d510ba75fd 100644 --- a/arch/riscv/lib/delay.c +++ b/arch/riscv/lib/delay.c @@ -1,21 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Regents of the University of California - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/delay.h> +#include <linux/math.h> #include <linux/param.h> #include <linux/timex.h> +#include <linux/types.h> #include <linux/export.h> +#include <asm/processor.h> + /* * This is copies from arch/arm/include/asm/delay.h * @@ -88,10 +84,14 @@ EXPORT_SYMBOL(__delay); void udelay(unsigned long usecs) { - unsigned long ucycles = usecs * lpj_fine * UDELAY_MULT; + u64 ucycles = (u64)usecs * lpj_fine * UDELAY_MULT; + u64 n; if (unlikely(usecs > MAX_UDELAY_US)) { - __delay((u64)usecs * riscv_timebase / 1000000ULL); + n = (u64)usecs * riscv_timebase; + do_div(n, 1000000); + + __delay(n); return; } |