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 992a1b1..4697fef 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1545,7 +1545,7 @@ rte_eal_hugepage_attach(void)
struct hugepage_file *hp = NULL;
unsigned num_hp = 0;
unsigned i, s = 0; /* s used to track the segment number */
- off_t size;
+ off_t size = 0;
int fd, fd_zero = -1, fd_hugepage = -1;
if (aslr_enabled() > 0) {
--
2.8.1
