Re: [PATCH] clocksource/drivers/pistachio: Fix wrong calculated clocksource read value

[Daniel Lezcano]

On 11/25/2015 04:42 PM, Jisheng Zhang wrote:
> Let's assume the counter value is 0xf000000, the pistachio clocksource
> read cycles function would return 0xffffffff0fffffff, but it should
> return 0xfffffff.
>
> We fix this issue by calculating bitwise-not counter, then cast to
> cycle_t.
>
> Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxxx>

Hi Jisheng,

I tried to reproduce this behavior on x86_64 but without success.

On which architecture did you produce this result ? Do you have a simple 
test program to check with ?

Thanks

  -- Daniel


--
 <http://www.linaro.org/> Linaro.org â Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/