2.6.39 Kernel Changes for FileSystem, get_sb removed

Abhijit Pawar apawar.linux at gmail.com
Tue Sep 20 07:44:23 EDT 2011

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.

+	->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.

Abhijit Pawar
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