Commit 66cc016a authored Aug 06, 2019 by Paul Walmsley

riscv: delay: use do_div() instead of __udivdi3()



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.

This second version removes the assignment of the remainder to an
unused temporary variable.  Thanks to Nicolas Pitre <nico@fluxnic.net>
for the suggestion.

Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Nicolas Pitre <nico@fluxnic.net>

parent 94ed3fde

arch/riscv/lib/delay.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -81,9 +81,13 @@ EXPORT_SYMBOL(__delay);
		void udelay(unsigned long usecs)
		{
		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;
		}