merge compat sys_ipc instances

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

ipc/compat.c

@@ -368,6 +368,50 @@ long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
 	return do_msgrcv(first, uptr, second, msgtyp, third,
 			 compat_do_msg_fill);
 }
+
+COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+	u32, third, compat_uptr_t, ptr, u32, fifth)
+{
+	int version;
+
+	version = call >> 16; /* hack for backward compatibility */
+	call &= 0xffff;
+
+	switch (call) {
+	case SEMOP:
+		/* struct sembuf is the same on 32 and 64bit :)) */
+		return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
+	case SEMTIMEDOP:
+		return compat_sys_semtimedop(first, compat_ptr(ptr), second,
+						compat_ptr(fifth));
+	case SEMGET:
+		return sys_semget(first, second, third);
+	case SEMCTL:
+		return compat_sys_semctl(first, second, third, compat_ptr(ptr));
+
+	case MSGSND:
+		return compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
+	case MSGRCV:
+		return compat_sys_msgrcv(first, second, fifth, third,
+					 version, compat_ptr(ptr));
+	case MSGGET:
+		return sys_msgget(first, second);
+	case MSGCTL:
+		return compat_sys_msgctl(first, second, compat_ptr(ptr));
+
+	case SHMAT:
+		return compat_sys_shmat(first, second, third, version,
+					compat_ptr(ptr));
+	case SHMDT:
+		return sys_shmdt(compat_ptr(ptr));
+	case SHMGET:
+		return sys_shmget(first, (unsigned)second, third);
+	case SHMCTL:
+		return compat_sys_shmctl(first, second, compat_ptr(ptr));
+	}
+
+	return -ENOSYS;
+}
 #else
 long compat_sys_semctl(int semid, int semnum, int cmd, int arg)
 {