GFS: lock_harness module

The lock_harness module allows a gfs file system to connect to a given lock module.

---

 fs/gfs2/locking/harness/Makefile       |    3 
 fs/gfs2/locking/harness/lm_interface.h |  289 +++++++++++++++++++++++++++++++++
 fs/gfs2/locking/harness/main.c         |  207 +++++++++++++++++++++++
 3 files changed, 499 insertions(+)

diff -urpN a/fs/gfs2/locking/harness/Makefile b/fs/gfs2/locking/harness/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_GFS2_FS) += lock_harness.o
+lock_harness-y := main.o
+