[PATCH] riscv: delay: use do_div() instead of __udivdi3()

[Paul Walmsley]

In preparation for removing __udivdi3() from the RISC-V
architecture-specific files, convert its one user to use do_div().
This avoids breaking the RV32 build after __udivdi3() is removed.

Signed-off-by: Paul Walmsley <paul.walms...@sifive.com>
---
 arch/riscv/lib/delay.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/lib/delay.c b/arch/riscv/lib/delay.c
index 87ff89e88f2c..8c686934e0f6 100644
--- a/arch/riscv/lib/delay.c
+++ b/arch/riscv/lib/delay.c
@@ -81,9 +81,14 @@ EXPORT_SYMBOL(__delay);
 void udelay(unsigned long usecs)
 {
        u64 ucycles = (u64)usecs * lpj_fine * UDELAY_MULT;
+       u64 n;
+       u32 rem;
 
        if (unlikely(usecs > MAX_UDELAY_US)) {
-               __delay((u64)usecs * riscv_timebase / 1000000ULL);
+               n = (u64)usecs * riscv_timebase;
+               rem = do_div(n, 1000000);
+
+               __delay(n);
                return;
        }
 
-- 
2.22.0