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mem: fix build with -O1

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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@6wind.com>
This commit is contained in:
Olivier Matz 2016-09-19 14:26:51 +02:00 committed by Thomas Monjalon
parent 595f302296
commit 11fd19f764
1 changed files with 1 additions and 1 deletions
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lib/librte_eal/linuxapp/eal/eal_memory.c
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@ -1279,7 +1279,7 @@ 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) {