--- include/linux/pid.h

+++ include/linux/pid.h

@@ -117,7 +117,7 @@ extern struct pid *find_vpid(int nr);

*/

extern struct pid *find_get_pid(int nr);

extern struct pid *find_ge_pid(int nr, struct pid_namespace *);

-int next_pidmap(struct pid_namespace *pid_ns, int last);

+int next_pidmap(struct pid_namespace *pid_ns, unsigned int last);

extern struct pid *alloc_pid(struct pid_namespace *ns);

extern void free_pid(struct pid *pid);