[dpdk-dev] [PATCH 05/10] uio: fix compilation with -Og
Olivier Matz
olivier.matz at 6wind.com
Mon Sep 11 17:13:28 CEST 2017
The compilation with gcc-6.3.0 and EXTRA_CFLAGS=-Og gives the following
error:
CC eal_pci_uio.o
eal_pci_uio.c: In function ‘pci_get_uio_de ’:
eal_pci_uio.c:221:9: error: ‘uio_num’ may be used uninitialized in
this function [-Werror=maybe-uninitialized]
return uio_num;
^~~~~~~
This is a false positive: gcc is not able to see that when e != NULL,
uio_num is always set. Fix the warning by initializing uio_num to -1,
and by the way, change the type to int.
Signed-off-by: Olivier Matz <olivier.matz at 6wind.com>
---
lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
index fa10329fd..b639ab938 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
@@ -154,7 +154,7 @@ pci_get_uio_dev(struct rte_pci_device *dev, char *dstbuf,
unsigned int buflen, int create)
{
struct rte_pci_addr *loc = &dev->addr;
- unsigned int uio_num;
+ int uio_num = -1;
struct dirent *e;
DIR *dir;
char dirname[PATH_MAX];
--
2.11.0
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