linux-kernel - Re: [PATCH] iio: buffer: Remove redundant assignment to in

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Date:   Mon, 17 May 2021 14:22:21 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     lars@...afoo.de, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: buffer: Remove redundant assignment to in_loc

On Mon, 17 May 2021 18:11:57 +0800
Jiapeng Chong <jiapeng.chong@...ux.alibaba.com> wrote:

> Variable in_loc is being assigned a value from a calculation
> however the assignment is never read, so this redundant assignment
> can be removed.
> 
> Clean up the following clang-analyzer warning:
> 
> drivers/iio/industrialio-buffer.c:929:3: warning: Value stored to
> 'in_loc' is never read [clang-analyzer-deadcode.DeadStores].
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to poke at it.

Thanks,

Jonathan

> ---
>  drivers/iio/industrialio-buffer.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
> index 10923b4..fdd6234 100644
> --- a/drivers/iio/industrialio-buffer.c
> +++ b/drivers/iio/industrialio-buffer.c
> @@ -926,7 +926,6 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
>  		if (ret)
>  			goto error_clear_mux_table;
>  		out_loc += length;
> -		in_loc += length;
>  	}
>  	buffer->demux_bounce = kzalloc(out_loc, GFP_KERNEL);
>  	if (buffer->demux_bounce == NULL) {