libcutils: UNUSED argument warnings

(cherry picked from commit ba02cd1e)

Change-Id: Ie427d481298af8d911bb2b157ebba30954335354

libcutils/android_reboot.c

@@ -25,6 +25,8 @@
 
 #include <cutils/android_reboot.h>
 
+#define UNUSED __attribute__((unused))
+
 /* Check to see if /proc/mounts contains any writeable filesystems
  * backed by a block device.
  * Return true if none found, else return false.
@@ -102,7 +104,7 @@ static void remount_ro(void)
 }
 
 
-int android_reboot(int cmd, int flags, char *arg)
+int android_reboot(int cmd, int flags UNUSED, char *arg)
 {
     int ret;
 

libcutils/socket_local_client.c

@@ -39,6 +39,8 @@ int socket_local_client(const char *name, int namespaceId, int type)
 
 #include "socket_local.h"
 
+#define UNUSED __attribute__((unused))
+
 #define LISTEN_BACKLOG 4
 
 /* Documented in header file. */
@@ -122,7 +124,7 @@ error:
  * Used by AndroidSocketImpl
  */
 int socket_local_client_connect(int fd, const char *name, int namespaceId, 
-        int type)
+        int type UNUSED)
 {
     struct sockaddr_un addr;
     socklen_t alen;

libcutils/str_parms.c

@@ -30,6 +30,8 @@
 
 #include <cutils/str_parms.h>
 
+#define UNUSED __attribute__((unused))
+
 struct str_parms {
     Hashmap *map;
 };
@@ -318,7 +320,7 @@ char *str_parms_to_str(struct str_parms *str_parms)
     return str;
 }
 
-static bool dump_entry(void *key, void *value, void *context)
+static bool dump_entry(void *key, void *value, void *context UNUSED)
 {
     ALOGI("key: '%s' value: '%s'\n", (char *)key, (char *)value);
     return true;