2.6.39 Kernel Changes for FileSystem, get_sb removed

[rohan puri]

On Tue, Sep 20, 2011 at 5:54 PM, Abhijit Pawar <apawar.linux at gmail.com>wrote:

>  On 09/20/2011 05:50 PM, rohan puri wrote:
>
>
>
> On Tue, Sep 20, 2011 at 5:14 PM, Abhijit Pawar <apawar.linux at gmail.com>wrote:
>
>>  Hi list,
>> It seems that the support for get_sb function is removed from kernel
>> 2.6.39 onwards. My code which is working till 2.6.38 series is failing with
>> new kernels.
>>
>> I tried finding out but there isnt anything mentioned. So if this function
>> itself is removed then how kernel is going to find out the superblock and
>> use it?
>>
>> Are we supposed to use the mount function provided? This is what i got
>> from one of the kernel patch email.
>>
>>  +[mandatory]
>> +	->get_sb() is gone.  Switch to use of ->mount().  Typically it's just
>> +a matter of switching from calling get_sb_... to mount_... and changing the
>> +function type.  If you were doing it manually, just switch from setting ->mnt_root
>> +to some pointer to returning that pointer.  On errors return ERR_PTR(...).
>> diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
>>
>>
>> It looks like there are other changes related to Pages are also done.
>>
>>
>> Regards,
>>  Abhijit Pawar
>>
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>>
>
> Hi Abhijit,
>
> Yes you have to make use of mount function pointer in the struct
> file_system_type.
>
> NOTE : - change is only in one parameter of type struct vfsmount which is
> basically removed from this function pointer.
>
> Regards,
> Rohan Puri
>
>  Thanks Rohan. Yes, i have made the changes and things are looking good.
> struct address_space_operation's sync_page is also removed.
>
> Regards,
> Abhijit Pawar
>
Welcome :)
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