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| Started by | Andy Lutomirski <luto@kernel.org> |
|---|---|
| First post | 2015-06-13 01:50 +0200 |
| Last post | 2015-06-17 01:10 +0200 |
| Articles | 2 — 2 participants |
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[PATCH v2 11/17] drivers/input/gameport: Replace rdtscl() with native_read_tsc() Andy Lutomirski <luto@kernel.org> - 2015-06-13 01:50 +0200
Re: [PATCH v2 11/17] drivers/input/gameport: Replace rdtscl() with native_read_tsc() Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-06-17 01:10 +0200
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Date | 2015-06-13 01:50 +0200 |
| Subject | [PATCH v2 11/17] drivers/input/gameport: Replace rdtscl() with native_read_tsc() |
| Message-ID | <pAGRY-44S-39@gated-at.bofh.it> |
It's unclear to me why this code exists in the first place.
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
drivers/input/gameport/gameport.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index e853a2134680..abc0cb22e750 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -149,9 +149,9 @@ static int old_gameport_measure_speed(struct gameport *gameport)
for(i = 0; i < 50; i++) {
local_irq_save(flags);
- rdtscl(t1);
+ t1 = native_read_tsc();
for (t = 0; t < 50; t++) gameport_read(gameport);
- rdtscl(t2);
+ t2 = native_read_tsc();
local_irq_restore(flags);
udelay(i * 10);
if (t2 - t1 < tx) tx = t2 - t1;
--
2.4.2
--
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| From | Dmitry Torokhov <dmitry.torokhov@gmail.com> |
|---|---|
| Date | 2015-06-17 01:10 +0200 |
| Subject | Re: [PATCH v2 11/17] drivers/input/gameport: Replace rdtscl() with native_read_tsc() |
| Message-ID | <pC89r-8tm-7@gated-at.bofh.it> |
| In reply to | #1164453 |
On Fri, Jun 12, 2015 at 04:44:51PM -0700, Andy Lutomirski wrote:
> It's unclear to me why this code exists in the first place.
>
> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Cc: linux-input@vger.kernel.org
> Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> drivers/input/gameport/gameport.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
> index e853a2134680..abc0cb22e750 100644
> --- a/drivers/input/gameport/gameport.c
> +++ b/drivers/input/gameport/gameport.c
> @@ -149,9 +149,9 @@ static int old_gameport_measure_speed(struct gameport *gameport)
>
> for(i = 0; i < 50; i++) {
> local_irq_save(flags);
> - rdtscl(t1);
> + t1 = native_read_tsc();
> for (t = 0; t < 50; t++) gameport_read(gameport);
> - rdtscl(t2);
> + t2 = native_read_tsc();
> local_irq_restore(flags);
> udelay(i * 10);
> if (t2 - t1 < tx) tx = t2 - t1;
> --
> 2.4.2
>
--
Dmitry
--
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