[Unionfs] RT kernel 2.6.23

[Erez Zadok]

In message <200711141011.20752.paul at gccs.co.za>, Paul Hewlett writes:
> Hi Erez
> 
> I upgraded to the RT kernel 2.6.23 from the pro-audio overlay of gentoo and 
> applied unionfs 2.1.9 cleanly. The compile failed in dentry.c and super.c. In 
> both cases a reference to the nrpages entry of the struct address_space was 
> made - this entry does not exist in the RT kernel but an access function 
> does.
> 
> To fix dentry.c at line 271 change 

This is for 2.6.23 only, right?  Once your testing is complete, please send
me a patch and I'll add it to the next release.  Actually, I think it would
be cleaner if unionfs simply calls mapping_nrpages() unconditionally.  Then,
in union.h, I can have a compatibility #ifdef; this way the main code stays
cleaner w/o so many ifdefs.

Cheers,
Erez.