On Wed, 2012-08-08 at 21:50 +0200, Mike Galbraith wrote:
> 32bit built do_div()
> and div64_u64() both sucked equally compared to 64bit
/me peeks at div64_u64 fallback implementation and sees why, it still
does a single div, it does some neat fls tricks.
Ok, no point in avoiding this then..
I did the below little edit, no point in mixing the old and new
primitives.. those __force things annoy me, but I guess otherwise we'll
upset sparse.
---
Index: linux-2.6/kernel/sched/core.c
===================================================================
--- linux-2.6.orig/kernel/sched/core.c
+++ linux-2.6/kernel/sched/core.c
@@ -3149,7 +3149,7 @@ static cputime_t scale_utime(cputime_t u
temp *= (__force u64) utime;
if (sizeof(cputime_t) == 4)
- do_div(temp, (__force u32) total);
+ temp = div_u64(temp, (__force u32) total);
else
temp = div64_u64(temp, (__force u64) total);
--
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