treewide: Fix more pointers which can be const

Here are some more pointers which can be const, as reported by cppcheck
2.19.1.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

3 files changed, 4 insertions, 3 deletions

diff --git a/conf.c b/conf.c
index 3eaa6c8..dbff87c 100644
--- a/conf.c
+++ b/conf.c
@@ -1234,7 +1234,7 @@ dns6:
  *
  * Return: 0 on success, negative error code on failure
  */
-static int conf_runas(char *opt, unsigned int *uid, unsigned int *gid)
+static int conf_runas(const char *opt, unsigned int *uid, unsigned int *gid)
 {
 	const char *uopt, *gopt = NULL;
 	char *sep = strchr(opt, ':');
diff --git a/dhcpv6.c b/dhcpv6.c
index d94be23..97c04e2 100644
--- a/dhcpv6.c
+++ b/dhcpv6.c
@@ -320,7 +320,7 @@ static bool dhcpv6_opt(struct iov_tail *data, uint16_t type)
 static bool dhcpv6_ia_notonlink(struct iov_tail *data,
 				struct in6_addr *la)
 {
-	int ia_types[2] = { OPT_IA_NA, OPT_IA_TA }, *ia_type;
+	int ia_types[2] = { OPT_IA_NA, OPT_IA_TA };
 	struct opt_ia_addr opt_addr_storage;
 	const struct opt_ia_addr *opt_addr;
 	struct iov_tail current, ia_base;
@@ -330,6 +330,7 @@ static bool dhcpv6_ia_notonlink(struct iov_tail *data,
 	struct in6_addr req_addr;
 	struct opt_hdr h_storage;
 	const struct opt_hdr *h;
+	const int *ia_type;
 
 	foreach(ia_type, ia_types) {
 		current = *data;
diff --git a/vhost_user.c b/vhost_user.c
index 1e320bf..9fe1241 100644
--- a/vhost_user.c
+++ b/vhost_user.c
@@ -442,7 +442,7 @@ static bool vu_set_mem_table_exec(struct vu_dev *vdev,
 	for (i = 0; i < vdev->memory.nregions; i++) {
 		struct vhost_user_memory_region *msg_region = &memory->regions[i];
 		struct vu_dev_region *dev_region = &vdev->memory.regions[i];
-		void *mmap_addr;
+		const void *mmap_addr;
 
 		debug("vhost-user region %d", i);
 		debug("    guest_phys_addr: 0x%016"PRIx64,