[RFC 4/6] hash: remove VLA warnings

[Konstantin Ananyev]

From: Konstantin Ananyev <konstantin.ananyev at huawei.com>

1) ./lib/hash/rte_cuckoo_hash.c:2362:9: warning: ISO C90 forbids variable length array ‘positions’ [-Wvla]
2) ../lib/hash/rte_cuckoo_hash.c:2478:9: warning: ISO C90 forbids variable length array ‘positions’ [-Wvla]

Both rte_hash_lookup_bulk_data() and
rte_hash_lookup_with_hash_bulk_data() expect
@num_keys <= RTE_HASH_LOOKUP_BULK_MAX.
So, for both cases it should be safe to replace VLA with fixed size
array.

Signed-off-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
---
 lib/hash/rte_cuckoo_hash.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/hash/rte_cuckoo_hash.c b/lib/hash/rte_cuckoo_hash.c
index 9cf94645f6..82b74bda18 100644
--- a/lib/hash/rte_cuckoo_hash.c
+++ b/lib/hash/rte_cuckoo_hash.c
@@ -2359,7 +2359,7 @@ rte_hash_lookup_bulk_data(const struct rte_hash *h, const void **keys,
 			(num_keys > RTE_HASH_LOOKUP_BULK_MAX) ||
 			(hit_mask == NULL)), -EINVAL);
 
-	int32_t positions[num_keys];
+	int32_t positions[RTE_HASH_LOOKUP_BULK_MAX];
 
 	__rte_hash_lookup_bulk(h, keys, num_keys, positions, hit_mask, data);
 
@@ -2475,7 +2475,7 @@ rte_hash_lookup_with_hash_bulk_data(const struct rte_hash *h,
 			(num_keys > RTE_HASH_LOOKUP_BULK_MAX) ||
 			(hit_mask == NULL)), -EINVAL);
 
-	int32_t positions[num_keys];
+	int32_t positions[RTE_HASH_LOOKUP_BULK_MAX];
 
 	__rte_hash_lookup_with_hash_bulk(h, keys, sig, num_keys,
 			positions, hit_mask, data);
-- 
2.35.3