linux-kernel - Re: [PATCH 1/2] EDAC, altera: remove useless casts

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Date:	Mon, 18 Apr 2016 09:19:39 -0500
From:	Thor Thayer <tthayer@...nsource.altera.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <bp@...en8.de>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
CC:	Alan Tull <atull@...nsource.altera.com>,
	Dinh Nguyen <dinguyen@...nsource.altera.com>,
	<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] EDAC, altera: remove useless casts



On 04/16/2016 03:13 PM, Arnd Bergmann wrote:
> The altera EDAC driver refers to its per-device data
> using a cast to '(void *)', which makes the pointer
> non-const, though both the source and destination are
> actually const.
>
> Removing the annotation makes the reference (almost)
> fit into a single line for improved readability, and
> ensures that it is actually defined as const.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/edac/altera_edac.c | 15 ++++++---------
>   1 file changed, 6 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
> index 11775dc0b139..cc987b4ce908 100644
> --- a/drivers/edac/altera_edac.c
> +++ b/drivers/edac/altera_edac.c
> @@ -232,8 +232,8 @@ static unsigned long get_total_mem(void)
>   }
>
>   static const struct of_device_id altr_sdram_ctrl_of_match[] = {
> -	{ .compatible = "altr,sdram-edac", .data = (void *)&c5_data},
> -	{ .compatible = "altr,sdram-edac-a10", .data = (void *)&a10_data},
> +	{ .compatible = "altr,sdram-edac", .data = &c5_data},
> +	{ .compatible = "altr,sdram-edac-a10", .data = &a10_data},
>   	{},
>   };
>   MODULE_DEVICE_TABLE(of, altr_sdram_ctrl_of_match);
> @@ -705,15 +705,12 @@ static void altr_create_edacdev_dbgfs(struct edac_device_ctl_info *edac_dci,
>
>   static const struct of_device_id altr_edac_device_of_match[] = {
>   #ifdef CONFIG_EDAC_ALTERA_L2C
> -	{ .compatible = "altr,socfpga-l2-ecc", .data = (void *)&l2ecc_data },
> -	{ .compatible = "altr,socfpga-a10-l2-ecc",
> -	  .data = (void *)&a10_l2ecc_data },
> +	{ .compatible = "altr,socfpga-l2-ecc", .data = &l2ecc_data },
> +	{ .compatible = "altr,socfpga-a10-l2-ecc", .data = &a10_l2ecc_data },
>   #endif
>   #ifdef CONFIG_EDAC_ALTERA_OCRAM
> -	{ .compatible = "altr,socfpga-ocram-ecc",
> -	  .data = (void *)&ocramecc_data },
> -	{ .compatible = "altr,socfpga-a10-ocram-ecc",
> -	  .data = (void *)&a10_ocramecc_data },
> +	{ .compatible = "altr,socfpga-ocram-ecc", .data = &ocramecc_data },
> +	{ .compatible = "altr,socfpga-a10-ocram-ecc", .data = &a10_ocramecc_data },
>   #endif
>   	{},
>   };
>

Acked-by: Thor Thayer <tthayer@...nsource.altera.com>