[dpdk-stable] patch 'mem: fix build with -O1' has been queued to stable release 16.07.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 16.07.1

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

Thanks.

	--yliu

---
>From d90ba37e63ece020c6e9274be54350f0887eeb03 Mon Sep 17 00:00:00 2001
From: Olivier Matz <olivier.matz at 6wind.com>
Date: Mon, 19 Sep 2016 14:26:51 +0200
Subject: [PATCH] mem: fix build with -O1

[ upstream commit 11fd19f7646743c973b9de52d75120045e62f116 ]
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When compiled with EXTRA_CFLAGS="-O1", the compiler is not
able to detect that size is always initialized when used, and
issues a wrong warning:

  eal_memory.c: In function ‘rte_eal_hugepage_attach’:
  eal_memory.c:1684:3: error: ‘size’ may be used uninitialized in this
                       function [-Werror=maybe-uninitialized]
     munmap(hp, size);
     ^

Workaround this issue by initializing size to 0.
Seen on gcc (Debian 5.4.1-1) 5.4.1 20160803.

Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
 lib/librte_eal/linuxapp/eal/eal_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 575de63..c04cff0 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1553,7 +1553,7 @@ rte_eal_hugepage_attach(void)
 	unsigned num_hp = 0;
 	unsigned i, s = 0; /* s used to track the segment number */
 	unsigned max_seg = RTE_MAX_MEMSEG;
-	off_t size;
+	off_t size = 0;
 	int fd, fd_zero = -1, fd_hugepage = -1;
 
 	if (aslr_enabled() > 0) {
-- 
1.9.0