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

From: [email-masked] (Daniel Lezcano)
Date: Tue, 15 Dec 2015 21:59:30 +0100

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 <[email-masked]>

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

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