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

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Date:   Mon, 18 Sep 2017 15:42:59 -0500
From:   Alan Tull <atull@...nel.org>
To:     Moritz Fischer <mdf@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-fpga@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] driver core: remove DRIVER_ATTR

On Mon, Sep 18, 2017 at 11:43 AM, Moritz Fischer <mdf@...nel.org> wrote:
> 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>
Acked-by: Alan Tull <atull@...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