fix inadvertent use of struct in place of union for semun

diff --git a/src/ipc/semctl.c b/src/ipc/semctl.c
index 49927e2ecff79539db21dde9fa47a30a32ae4269..3d79f5030811e59a50a5eda8dc3cd8b6ae46731c 100644 (file)
--- a/src/ipc/semctl.c
+++ b/src/ipc/semctl.c
@@ -3,7 +3,7 @@
 #include "syscall.h"
 #include "ipc.h"
 
-struct semun {
+union semun {
        int val;
        struct semid_ds *buf;
        unsigned short *array;
@@ -11,10 +11,10 @@ struct semun {
 
 int semctl(int id, int num, int cmd, ...)
 {
-       struct semun arg;
+       union semun arg;
        va_list ap;
        va_start(ap, cmd);
-       arg = va_arg(ap, struct semun);
+       arg = va_arg(ap, union semun);
        va_end(ap);
 #ifdef SYS_semctl
        return syscall(SYS_semctl, id, num, cmd | IPC_64, arg.buf);