fix assignment of signed to bigger unsigned issue

src/lxc/conf.c

@@ -963,7 +963,8 @@ static int lxc_setup_ttys(struct lxc_conf *conf)
 
 int lxc_allocate_ttys(struct lxc_conf *conf)
 {
-	int i, ret;
+	size_t i;
+	int ret;
 	struct lxc_tty_info *ttys = &conf->ttys;
 
 	/* no tty in the configuration */
@@ -981,7 +982,7 @@ int lxc_allocate_ttys(struct lxc_conf *conf)
 		tty->slave = -EBADF;
 		ret = openpty(&tty->master, &tty->slave, NULL, NULL, NULL);
 		if (ret < 0) {
-			SYSERROR("Failed to create tty %d", i);
+			SYSERROR("Failed to create tty %zu", i);
 			ttys->max = i;
 			lxc_delete_tty(ttys);
 			return -ENOTTY;
@@ -989,7 +990,7 @@ int lxc_allocate_ttys(struct lxc_conf *conf)
 
 		ret = ttyname_r(tty->slave, tty->name, sizeof(tty->name));
 		if (ret < 0) {
-			SYSERROR("Failed to retrieve name of tty %d slave", i);
+			SYSERROR("Failed to retrieve name of tty %zu slave", i);
 			ttys->max = i;
 			lxc_delete_tty(ttys);
 			return -ENOTTY;

src/lxc/criu.c

@@ -677,7 +677,7 @@ bool __criu_check_feature(uint64_t *features_to_check)
 	pid_t pid;
 	uint64_t current_bit = 0;
 	int ret;
-	int features = *features_to_check;
+	uint64_t features = *features_to_check;
 	/* Feature checking is currently always like
 	 * criu check --feature <feature-name>
 	 */

src/lxc/storage/btrfs.h

@@ -396,7 +396,7 @@ extern int btrfs_mount(struct lxc_storage *bdev);
 extern int btrfs_umount(struct lxc_storage *bdev);
 
 extern char *get_btrfs_subvol_path(int fd, u64 dir_id, u64 objid, char *name,
-				   int name_len);
+				   u16 name_len);
 extern int btrfs_list_get_path_rootid(int fd, u64 *treeid);
 extern bool is_btrfs_fs(const char *path);
 extern int is_btrfs_subvol(const char *path);