Version 2.1 must retain source code compatability with 2.0,
all structure fields should be retained. If a field is no
longer used it should have been marked as deprecated.

Fixes: 661e75ef8cac ("hash: rename unused field")

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 lib/librte_hash/rte_hash.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_hash/rte_hash.h b/lib/librte_hash/rte_hash.h
index 175c0bb..47d6e4d 100644
--- a/lib/librte_hash/rte_hash.h
+++ b/lib/librte_hash/rte_hash.h
@@ -69,7 +69,8 @@ typedef uint32_t (*rte_hash_function)(const void *key, 
uint32_t key_len,
 struct rte_hash_parameters {
        const char *name;               /**< Name of the hash. */
        uint32_t entries;               /**< Total hash table entries. */
-       uint32_t reserved;              /**< Unused field. Should be set to 0 */
+       uint32_t num_buckets            /**< Unused in current algorithm */
+               __attribute__((deprecated));
        uint32_t key_len;               /**< Length of hash key. */
        rte_hash_function hash_func;    /**< Primary Hash function used to 
calculate hash. */
        uint32_t hash_func_init_val;    /**< Init value used by hash_func. */
-- 
2.1.4

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