linux-kernel - Re: [RFC/RFT v3 05/14] soc: amlogic: meson-clk-measure: protect measure with a mutex

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Message-ID: <CAFBinCD8WfhgcjKfstvVoDaLWm9yoZUg4SJpj-i1R+KgZ17aKg@mail.gmail.com>
Date:   Wed, 3 Jul 2019 01:01:47 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     jbrunet@...libre.com, khilman@...libre.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org
Subject: Re: [RFC/RFT v3 05/14] soc: amlogic: meson-clk-measure: protect
 measure with a mutex

Hi Neil,

On Mon, Jul 1, 2019 at 11:13 AM Neil Armstrong <narmstrong@...libre.com> wrote:
>
> In order to protect clock measuring when multiple process asks for
> a measure, protect the main measure function with mutexes.
>
> Reviewed-by: Kevin Hilman <khilman@...libre.com>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  drivers/soc/amlogic/meson-clk-measure.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/soc/amlogic/meson-clk-measure.c b/drivers/soc/amlogic/meson-clk-measure.c
> index 19d4cbc93a17..c470e24f1dfa 100644
> --- a/drivers/soc/amlogic/meson-clk-measure.c
> +++ b/drivers/soc/amlogic/meson-clk-measure.c
> @@ -11,6 +11,8 @@
>  #include <linux/debugfs.h>
>  #include <linux/regmap.h>
>
> +static DEFINE_MUTEX(measure_lock);
I wonder if that should be part of struct meson_msr for consistency reasons

apart from that:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>