linux-kernel - Re: [PATCH] HID: nintendo: Fix unused-const-variable compiler warning

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Date:   Wed, 20 Jul 2022 08:27:31 -0700
From:   Guenter Roeck <groeck@...gle.com>
To:     Aashish Sharma <shraash@...gle.com>
Cc:     "Daniel J . Ogorchock" <djogorchock@...il.com>,
        Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Guenter Roeck <groeck@...omium.org>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] HID: nintendo: Fix unused-const-variable compiler warning

On Tue, Jul 19, 2022 at 10:43 PM Aashish Sharma <shraash@...gle.com> wrote:
>
> The following compiler warning is produced when CONFIG_NINTENDO_FF
> is not set:
>
> >> drivers/hid/hid-nintendo.c:405:29: warning: 'JC_RUMBLE_ZERO_AMP_PKT_CNT'
>    defined but not used [-Wunused-const-variable=]
>
> To fix this, move the variable 'JC_RUMBLE_ZERO_AMP_PKT_CNT' under the
> CONFIG_NINTENDO_FF's conditional compilation block.
>
> Signed-off-by: Aashish Sharma <shraash@...gle.com>

Reviewed-by: Guenter Roeck <groeck@...omium.org>

> ---
>  drivers/hid/hid-nintendo.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
> index 2204de889739..69de7504bdbc 100644
> --- a/drivers/hid/hid-nintendo.c
> +++ b/drivers/hid/hid-nintendo.c
> @@ -402,8 +402,6 @@ struct joycon_input_report {
>  #define JC_RUMBLE_DATA_SIZE    8
>  #define JC_RUMBLE_QUEUE_SIZE   8
>
> -static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
> -
>  static const char * const joycon_player_led_names[] = {
>         LED_FUNCTION_PLAYER1,
>         LED_FUNCTION_PLAYER2,
> @@ -1512,6 +1510,8 @@ static void joycon_clamp_rumble_freqs(struct joycon_ctlr *ctlr)
>         spin_unlock_irqrestore(&ctlr->lock, flags);
>  }
>
> +static const unsigned short JC_RUMBLE_ZERO_AMP_PKT_CNT = 5;
> +
>  static int joycon_set_rumble(struct joycon_ctlr *ctlr, u16 amp_r, u16 amp_l,
>                              bool schedule_now)
>  {
> --
> 2.37.0.170.g444d1eabd0-goog
>