Tools: hv: kvp: eliminate 'may be used uninitialized' warning

When building hv_kvp_daemon GCC-8.3 complains:

hv_kvp_daemon.c: In function ‘kvp_get_ip_info.constprop’:
hv_kvp_daemon.c:812:30: warning: ‘ip_buffer’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  struct hv_kvp_ipaddr_value *ip_buffer;

this seems to be a false positive: we only use ip_buffer when
op == KVP_OP_GET_IP_INFO and it is only unset when op == KVP_OP_ENUMERATE.

Silence the warning by initializing ip_buffer to NULL.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index f559750..e9ef4ca 100644 (file)
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -809,7 +809,7 @@ kvp_get_ip_info(int family, char *if_name, int op,
        int sn_offset = 0;
        int error = 0;
        char *buffer;
-       struct hv_kvp_ipaddr_value *ip_buffer;
+       struct hv_kvp_ipaddr_value *ip_buffer = NULL;
        char cidr_mask[5]; /* /xyz */
        int weight;
        int i;