Fix: Add f_dentry wrapper for 3.19+ kernels

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fix: update module instrumentation for 3.19+ kernels

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fix: update scsi instrumentation for 3.19+ kernels

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>