2.6.39 Kernel Changes for FileSystem, get_sb removed

kashish bhatia koolest77 at gmail.com
Tue Sep 20 09:16:56 EDT 2011

Hi Abhijit,

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.
 The function "get_sb()" is still present in security/inode.c in kernel
2.6.39. Only the function pointer of get_sb() has been removed from
struct file_system_type in /include/linux/fs.h.

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.
Yes , you are supposed to use mount function.
visit the following link :

> +	->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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