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SubjectRe: [PATCH 2/2] clocksource/drivers/exynos_mct: Mark MCT device as CLOCK_EVT_FEAT_PERCPU
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On 6/9/21 12:43 AM, Will Deacon wrote:
> The "mct_tick" is a per-cpu clockevents device. Set the
> CLOCK_EVT_FEAT_PERCPU feature to prevent e.g. mct_tick0 being unsafely
> designated as the global broadcast timer and instead treat the device as
> a per-cpu wakeup timer.
>
> Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> Signed-off-by: Will Deacon <will@kernel.org>
> ---
> drivers/clocksource/exynos_mct.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
> index 804d3e01c8f4..5e3e96d3d1b9 100644
> --- a/drivers/clocksource/exynos_mct.c
> +++ b/drivers/clocksource/exynos_mct.c
> @@ -465,7 +465,8 @@ static int exynos4_mct_starting_cpu(unsigned int cpu)
> evt->set_state_oneshot = set_state_shutdown;
> evt->set_state_oneshot_stopped = set_state_shutdown;
> evt->tick_resume = set_state_shutdown;
> - evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
> + evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |
> + CLOCK_EVT_FEAT_PERCPU;
> evt->rating = MCT_CLKEVENTS_RATING,
>
> exynos4_mct_write(TICK_BASE_CNT, mevt->base + MCT_L_TCNTB_OFFSET);
>

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

--
Best Regards,
Chanwoo Choi
Samsung Electronics

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