From 84585f330fc3d5296d9b660bb639ebc8c7bf2aff Mon Sep 17 00:00:00 2001 From: Olivier Matz Date: Mon, 11 Sep 2017 17:13:28 +0200 Subject: [PATCH] uio: fix compilation with -Og MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 --- 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 fa10329fd4..b639ab9383 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]; -- 2.20.1