include/vdso/math64.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __VDSO_MATH64_H
   3 #define __VDSO_MATH64_H
   4
   5 static __always_inline u32
   6 __iter_div_u64_rem(u64 dividend, u32 divisor, u64 *remainder)
   7 {
   8         u32 ret = 0;
   9
  10         while (dividend >= divisor) {
  11                 /* The following asm() prevents the compiler from
  12                    optimising this loop into a modulo operation.  */
  13                 asm("" : "+rm"(dividend));
  14
  15                 dividend -= divisor;
  16                 ret++;
  17         }
  18
  19         *remainder = dividend;
  20
  21         return ret;
  22 }
  23
  24 #endif /* __VDSO_MATH64_H */