dkms build error

Hi,

Unfortunately, I did not succeed to compile a btrfs module via dkms fro= m
btrfs-unstable (commit 9aeead73782c4b8e2a91def36dbf95db28605c95) for ke= rnel
version 2.6.34-git16. For the exact error message, please see the make.= log
attached. If I replace the symlink to btrfs-unstable/fs/btrfs by a suml= ink
to the corresponding subdirectory of the kernel tree everything works w= ell.

Thanks,
Andreas Philipp

aph@thor ~ $ cat /var/lib/dkms/btrfs/git/build/make.log
DKMS make.log for btrfs-git for kernel 2.6.34-git16 (x86_64) Sun May 30 20:37:43 CEST 2010
make: Entering directory `/usr/src/linux-2.6.34-git16'
LD /var/lib/dkms/btrfs/git/build/built-in.o
CC [M] /var/lib/dkms/btrfs/git/build/super.o
/var/lib/dkms/btrfs/git/build/super.c: In function =91btrfs_fill_super=92= :
/var/lib/dkms/btrfs/git/build/super.c:446: warning: assignment from inc= ompatible pointer type
CC [M] /var/lib/dkms/btrfs/git/build/ctree.o
CC [M] /var/lib/dkms/btrfs/git/build/extent-tree.o
/var/lib/dkms/btrfs/git/build/extent-tree.c: In function =91btrfs_issue= _discard=92:
/var/lib/dkms/btrfs/git/build/extent-tree.c:1699: error: =91DISCARD_FL_= BARRIER=92 undeclared (first use in this function) /var/lib/dkms/btrfs/git/build/extent-tree.c:1699: error: (Each undeclar= ed identifier is reported only once /var/lib/dkms/btrfs/git/build/extent-tree.c:1699: error: for each funct= ion it appears in.)
make[1]: *** [/var/lib/dkms/btrfs/git/build/extent-tree.o] Error 1
make: *** [_module_/var/lib/dkms/btrfs/git/build] Error 2
make: Leaving directory `/usr/src/linux-2.6.34-git16'

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