diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h
index 805535e..774d8ff 100644
--- a/drivers/staging/rdma/hfi1/hfi.h
+++ b/drivers/staging/rdma/hfi1/hfi.h
@@ -313,6 +313,7 @@
 	 */
 	struct task_struct *progress;
 	struct list_head sdma_queues;
+	/* protect sdma queues */
 	spinlock_t sdma_qlock;
 
 	/* Is ASPM interrupt supported for this context */
@@ -380,6 +381,7 @@
 	int mode_flag;
 	struct cdev cdev;
 	struct device *class_dev;
+	/* protect snoop data */
 	spinlock_t snoop_lock;
 	struct list_head queue;
 	wait_queue_head_t waitq;
@@ -561,6 +563,7 @@
 };
 
 struct vl_arb_cache {
+	/* protect vl arb cache */
 	spinlock_t lock;
 	struct ib_vl_weight_elem table[VL_ARB_TABLE_SIZE];
 };
diff --git a/drivers/staging/rdma/hfi1/qsfp.h b/drivers/staging/rdma/hfi1/qsfp.h
index 9f6e2f3..c391750 100644
--- a/drivers/staging/rdma/hfi1/qsfp.h
+++ b/drivers/staging/rdma/hfi1/qsfp.h
@@ -215,6 +215,7 @@
 	struct hfi1_pportdata *ppd;
 	struct work_struct qsfp_work;
 	u8 cache[QSFP_MAX_NUM_PAGES * 128];
+	/* protect qsfp data */
 	spinlock_t qsfp_lock;
 	u8 check_interrupt_flags;
 	u8 reset_needed;
diff --git a/drivers/staging/rdma/hfi1/sdma.h b/drivers/staging/rdma/hfi1/sdma.h
index 0c5f501..5aec18b 100644
--- a/drivers/staging/rdma/hfi1/sdma.h
+++ b/drivers/staging/rdma/hfi1/sdma.h
@@ -412,6 +412,7 @@
 	u32                   progress_check_head;
 	/* private: */
 	struct work_struct flush_worker;
+	/* protect flush list */
 	spinlock_t flushlist_lock;
 	/* private: */
 	struct list_head flushlist;