linux-kernel - Re: [PATCH v3 3/7] ACPI / device_sysfs: make use of new strtolower() function

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Date:	Sat, 09 Jul 2016 01:22:53 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Markus Mayer <mmayer@...adcom.com>
Cc:	Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/7] ACPI / device_sysfs: make use of new strtolower() function

On Friday, July 08, 2016 03:43:10 PM Markus Mayer wrote:
> Call strtolower() rather than walking the string explicitly to convert
> it to lowercase.
> 
> Signed-off-by: Markus Mayer <mmayer@...adcom.com>
> ---
> 
> Rafael, I left off your ACK, since the implementation of my function
> changed somewhat (doesn't check the argument NULL, doesn't return
> anything). Please let me know if you are still okay with this.

I am, as long as it doesn't change the result, which seems to be the case.

>  drivers/acpi/device_sysfs.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
> index 7b2c48f..1db38c7 100644
> --- a/drivers/acpi/device_sysfs.c
> +++ b/drivers/acpi/device_sysfs.c
> @@ -200,12 +200,10 @@ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
>  	const union acpi_object *of_compatible, *obj;
>  	int len, count;
>  	int i, nval;
> -	char *c;
>  
>  	acpi_get_name(acpi_dev->handle, ACPI_SINGLE_NAME, &buf);
>  	/* DT strings are all in lower case */
> -	for (c = buf.pointer; *c != '\0'; c++)
> -		*c = tolower(*c);
> +	strtolower(buf.pointer);
>  
>  	len = snprintf(modalias, size, "of:N%sT", (char *)buf.pointer);
>  	ACPI_FREE(buf.pointer);
> 

Thanks,
Rafael