linux-kernel - Re: [PATCH 2/2] driver core: remove DRIVER

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Message-ID: <20170918164349.GB31137@tyrael.ni.corp.natinst.com>
Date:   Mon, 18 Sep 2017 09:43:49 -0700
From:   Moritz Fischer <mdf@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alan Tull <atull@...nel.org>, Moritz Fischer <mdf@...nel.org>,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] driver core: remove DRIVER_ATTR

On Mon, Sep 18, 2017 at 12:17:57PM +0200, Greg Kroah-Hartman wrote:
> 
> DRIVER_ATTR is no longer in use, and driver authors should be using
> DRIVER_ATTR_RW() or DRIVER_ATTR_RO() or DRIVER_ATTR_WO() instead in
> order to always get the permissions correct.  So remove it so that no
> one can use it anymore.
> 
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Reviewed-by: Moritz Fischer <mdf@...nel.org>
> ---
>  Documentation/driver-model/driver.txt | 7 ++++---
>  Documentation/filesystems/sysfs.txt   | 3 ++-
>  include/linux/device.h                | 2 --
>  3 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/driver-model/driver.txt b/Documentation/driver-model/driver.txt
> index 4421135826a2..d661e6f7e6a0 100644
> --- a/Documentation/driver-model/driver.txt
> +++ b/Documentation/driver-model/driver.txt
> @@ -196,12 +196,13 @@ struct driver_attribute {
>  };
>  
>  Device drivers can export attributes via their sysfs directories. 
> -Drivers can declare attributes using a DRIVER_ATTR macro that works
> -identically to the DEVICE_ATTR macro. 
> +Drivers can declare attributes using a DRIVER_ATTR_RW and DRIVER_ATTR_RO
> +macro that works identically to the DEVICE_ATTR_RW and DEVICE_ATTR_RO
> +macros.
>  
>  Example:
>  
> -DRIVER_ATTR(debug,0644,show_debug,store_debug);
> +DRIVER_ATTR_RW(debug);
>  
>  This is equivalent to declaring:
>  
> diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
> index 24da7b32c489..9a3658cc399e 100644
> --- a/Documentation/filesystems/sysfs.txt
> +++ b/Documentation/filesystems/sysfs.txt
> @@ -366,7 +366,8 @@ struct driver_attribute {
>  
>  Declaring:
>  
> -DRIVER_ATTR(_name, _mode, _show, _store)
> +DRIVER_ATTR_RO(_name)
> +DRIVER_ATTR_RW(_name)
>  
>  Creation/Removal:
>  
> diff --git a/include/linux/device.h b/include/linux/device.h
> index c6f27207dbe8..2bc70ddda09b 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -307,8 +307,6 @@ struct driver_attribute {
>  			 size_t count);
>  };
>  
> -#define DRIVER_ATTR(_name, _mode, _show, _store) \
> -	struct driver_attribute driver_attr_##_name = __ATTR(_name, _mode, _show, _store)
>  #define DRIVER_ATTR_RW(_name) \
>  	struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)
>  #define DRIVER_ATTR_RO(_name) \
> -- 
> 2.14.1
> 

Thanks,

Moritz

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