On Wed, Nov 16, 2016 at 11:30 AM, Chris Metcalf <cmetcalf@xxxxxxxxxxxx> wrote:
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.hJust as a heads up, it seems your working against an older kernel, as
index 08398182f56e..5444429884b8 100644
@@ -171,6 +171,10 @@ static inline u32 clocksource_hz2mult(u32 hz, u32
* Converts cycles to nanoseconds, using the given mult and shift.
+ * The code is optimized for performance and not intended to work
+ * with absolute clocksource cycles, as it will easily overflow,
+ * but just intended for relative (delta) clocksource cycles.
* XXX - This could use some mult_lxl_ll() asm optimization
this didn't apply. Its simple enough to fix up, so I'll do so, but in
the future, please submit patches against something close to Linus