Re: [PATCH v2] imu:adis16400_core: fix debugfs_simple_attr.cocci warnings

[Jonathan Cameron <jic23@kernel.org>]

On Thu, 11 Jan 2018 10:28:22 +0530
venkat.prashanth2498@gmail.com wrote:

> From: Venkat Prashanth B U <venkat.prashanth2498@gmail.com>
> 
> Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
> for debugfs files.
> 
> Semantic patch information:
> Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
> imposes some significant overhead as compared to
> DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().
> 
> Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci
> 
> Signed-off-by: Venkat Prashanth B U <venkat.prashanth2498@gmail.com>

Please read the code you are patching.  The indentation in this
patch is wrong and does not reflect what it is doing.

Jonathan

> ---
> Change Log v1:-
> - Fixed indentation issue.
> - changed the subject line appropriately.
> ---
>  drivers/iio/imu/adis16400_core.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/iio/imu/adis16400_core.c b/drivers/iio/imu/adis16400_core.c
> index 46a5690..b199c73 100644
> --- a/drivers/iio/imu/adis16400_core.c
> +++ b/drivers/iio/imu/adis16400_core.c
> @@ -85,7 +85,7 @@ static int adis16400_show_product_id(void *arg, u64 *val)
> 
>  	return 0;
>  }
> -DEFINE_SIMPLE_ATTRIBUTE(adis16400_product_id_fops,
> +DEFINE_DEBUGFS_ATTRIBUTE(adis16400_product_id_fops,
>  	adis16400_show_product_id, NULL, "%lld\n");
> 
>  static int adis16400_show_flash_count(void *arg, u64 *val)
> @@ -102,7 +102,7 @@ static int adis16400_show_flash_count(void *arg, u64 *val)
> 
>  	return 0;
>  }
> -DEFINE_SIMPLE_ATTRIBUTE(adis16400_flash_count_fops,
> +DEFINE_DEBUGFS_ATTRIBUTE(adis16400_flash_count_fops,
>  	adis16400_show_flash_count, NULL, "%lld\n");
> 
>  static int adis16400_debugfs_init(struct iio_dev *indio_dev)
> @@ -110,15 +110,16 @@ static int adis16400_debugfs_init(struct iio_dev *indio_dev)
>  	struct adis16400_state *st = iio_priv(indio_dev);
> 
>  	if (st->variant->flags & ADIS16400_HAS_SERIAL_NUMBER)
> -		debugfs_create_file("serial_number", 0400,
> +		debugfs_create_file_unsafe("serial_number", 0400,
>  			indio_dev->debugfs_dentry, st,
>  			&adis16400_serial_number_fops);
>  	if (st->variant->flags & ADIS16400_HAS_PROD_ID)
> -		debugfs_create_file("product_id", 0400,
> +		debugfs_create_file_unsafe("product_id", 0400,
>  			indio_dev->debugfs_dentry, st,
>  			&adis16400_product_id_fops);
> -	debugfs_create_file("flash_count", 0400, indio_dev->debugfs_dentry,
> -		st, &adis16400_flash_count_fops);
> +		debugfs_create_file_unsafe("flash_count", 0400,
> +			indio_dev->debugfs_dentry, st,
> +			&adis16400_flash_count_fops);
> 
>  	return 0;
>  }
> --
> 1.9.1
>