[dpdk-dev] [PATCH v2 1/4] hash: fix TSX aborts with newer gcc

[Bruce Richardson <bruce.richardson@intel.com>]

From: Yipeng Wang <yipeng1.wang@intel.com>

gcc 7 and 8 with O3 will generate vzeroupper from rte_memcpy
into TSX region which may abort the TSX transaction.

This fix changes rte_memcpy to memcpy which will not insert
extra vzeroupper into the library.

Fixes: f2e3001b53ec ("hash: support read/write concurrency")
Cc: stable@dpdk.org

Signed-off-by: Yipeng Wang <yipeng1.wang@intel.com>
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/librte_hash/rte_cmp_x86.h     | 2 ++
 lib/librte_hash/rte_cuckoo_hash.c | 3 +--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/librte_hash/rte_cmp_x86.h b/lib/librte_hash/rte_cmp_x86.h
index e82b4c0..13a5836 100644
--- a/lib/librte_hash/rte_cmp_x86.h
+++ b/lib/librte_hash/rte_cmp_x86.h
@@ -2,6 +2,8 @@
  * Copyright(c) 2015 Intel Corporation
  */
 
+#include <rte_vect.h>
+
 /* Functions to compare multiple of 16 byte keys (up to 128 bytes) */
 static int
 rte_hash_k16_cmp_eq(const void *key1, const void *key2, size_t key_len __rte_unused)
diff --git a/lib/librte_hash/rte_cuckoo_hash.c b/lib/librte_hash/rte_cuckoo_hash.c
index 5ddcccd..76f5dc8 100644
--- a/lib/librte_hash/rte_cuckoo_hash.c
+++ b/lib/librte_hash/rte_cuckoo_hash.c
@@ -13,7 +13,6 @@
 #include <rte_common.h>
 #include <rte_memory.h>         /* for definition of RTE_CACHE_LINE_SIZE */
 #include <rte_log.h>
-#include <rte_memcpy.h>
 #include <rte_prefetch.h>
 #include <rte_branch_prediction.h>
 #include <rte_malloc.h>
@@ -982,7 +981,7 @@ struct rte_hash *
 	new_k = RTE_PTR_ADD(keys, (uintptr_t)slot_id * h->key_entry_size);
 	new_idx = (uint32_t)((uintptr_t) slot_id);
 	/* Copy key */
-	rte_memcpy(new_k->key, key, h->key_len);
+	memcpy(new_k->key, key, h->key_len);
 	/* Key can be of arbitrary length, so it is not possible to store
 	 * it atomically. Hence the new key element's memory stores
 	 * (key as well as data) should be complete before it is referenced.
-- 
1.8.5.6