[Unionfs] modprobe error on CentOS 5.2 (RHEL 5.2)

[Nitin Bhardwaj]

Now, I have tried building the RPMs with different permutations of
kernel specs and unionfs-2.x patches, and have deduced the following
(The version of patch doesn't matter: problem is exhibited by both
2.3.3 as well as 2.4 RHEL5 patches,
and the kabi check has to be turned OFF everytime):

If I do NOT include CONFIG_UNION_FS_XATTR=y in the kernel spec, the
prep stage of the rpmbuild fails with the following:
--------------------------------------------------------
+ make ARCH=i386 nonint_oldconfig
CONFIG_UNION_FS_XATTR
make[1]: *** [nonint_oldconfig] Error 2
--------------------------------------------------------

On the other hand, If I insert CONFIG_UNION_FS_XATTR=y into the kernel
spec, the prep goes fine, but later the compilation
fails with the following:
--------------------------------------------------------
   CC [M]  fs/unionfs/rdstate.o
   CC [M]  fs/unionfs/copyup.o
 fs/unionfs/copyup.c: In function 'copyup_xattrs':
 fs/unionfs/copyup.c:38: error: implicit declaration of function
 'vfs_listxattr'
 make[2]: *** [fs/unionfs/copyup.o] Error 1
 make[1]: *** [fs/unionfs] Error 2
 make: *** [fs] Error 2
--------------------------------------------------------


Any suggestions ?


Thanks,
Nitin.