NFS: Add a new NFS debugging flag just for mount processing

Note to self: fix up /usr/sbin/rpcdebug too

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 7deb5b0..04f659f 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -553,6 +553,7 @@
 #define NFSDBG_ROOT		0x0080
 #define NFSDBG_CALLBACK		0x0100
 #define NFSDBG_CLIENT		0x0200
+#define NFSDBG_MOUNT		0x0400
 #define NFSDBG_ALL		0xFFFF
 
 #ifdef __KERNEL__