[dpdk-stable] patch 'lpm6: fix compilation with -Og' has been queued to LTS release 16.11.4

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/04/17. So please
shout if anyone has objections.

Thanks.

Kind regards,
Luca Boccassi

---
>From 089ee37f4d7d9eb3e2db6432cdc3a6ab4f007a18 Mon Sep 17 00:00:00 2001
From: Olivier Matz <olivier.matz at 6wind.com>
Date: Mon, 11 Sep 2017 17:13:31 +0200
Subject: [PATCH] lpm6: fix compilation with -Og
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

[ upstream commit 1f148d8eaf3baaf123fd8bf692947fe9437a5ab6 ]

The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following
error:

  CC rte_lpm6.o
  rte_lpm6.c: In function ‘rte_lpm6_add_v1705’:
  rte_lpm6.c:442:11: error: ‘tbl_next’ may be used uninitialized in
                             this function [-Werror=maybe-uninitialized]
     if (!tbl[tbl_index].valid) {
             ^
  rte_lpm6.c:521:29: note: ‘tbl_next’ was declared here
    struct rte_lpm6_tbl_entry *tbl_next;
                               ^~~~~~~~

This is a false positive from gcc. Fix it by initializing tbl_next
to NULL.

Fixes: 5c510e13a9cb ("lpm: add IPv6 support")

Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
---
 lib/librte_lpm/rte_lpm6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_lpm/rte_lpm6.c b/lib/librte_lpm/rte_lpm6.c
index 32fdba01e..f9fecbe3a 100644
--- a/lib/librte_lpm/rte_lpm6.c
+++ b/lib/librte_lpm/rte_lpm6.c
@@ -511,7 +511,7 @@ rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
 		uint8_t next_hop)
 {
 	struct rte_lpm6_tbl_entry *tbl;
-	struct rte_lpm6_tbl_entry *tbl_next;
+	struct rte_lpm6_tbl_entry *tbl_next = NULL;
 	int32_t rule_index;
 	int status;
 	uint8_t masked_ip[RTE_LPM6_IPV6_ADDR_SIZE];
-- 
2.11.0