[PATCH v3 1/4] kni: add define guards to avoid multi-inclusion

[Weiguo Li]

Supplement define guards to prevent multiple inclusion.

Signed-off-by: Weiguo Li <liwg06 at foxmail.com>
---
 lib/kni/rte_kni_fifo.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/kni/rte_kni_fifo.h b/lib/kni/rte_kni_fifo.h
index d2ec82fe87..2ff71554c0 100644
--- a/lib/kni/rte_kni_fifo.h
+++ b/lib/kni/rte_kni_fifo.h
@@ -2,7 +2,8 @@
  * Copyright(c) 2010-2014 Intel Corporation
  */
 
-
+#ifndef RTE_KNI_FIFO_H
+#define RTE_KNI_FIFO_H
 
 /**
  * @internal when c11 memory model enabled use c11 atomic memory barrier.
@@ -115,3 +116,5 @@ kni_fifo_free_count(struct rte_kni_fifo *fifo)
 	uint32_t fifo_read = __KNI_LOAD_ACQUIRE(&fifo->read);
 	return (fifo_read - fifo_write - 1) & (fifo->len - 1);
 }
+
+#endif /* RTE_KNI_FIFO_H */
-- 
2.25.1