[PATCH] ppc64: shmget() translation bugfix

From: David Gibson <david@gibson.dropbear.id.au>

The 32->64 bit syscall translation layer on ppc64 incorrectly sign-
extends rather than zero-extending the second parameter to shmget(),
which should be a size_t.  This means that it is impossible to shmget()
more 2GB or more from a 32-bit process.

arch/ppc64/kernel/sys_ppc32.c

@@ -1666,7 +1666,7 @@ asmlinkage long sys32_ipc(u32 call, u32 first_parm, u32 second_parm, u32 third_p
 		err = sys_shmdt((char *)AA(ptr));
 		break;
 	case SHMGET:
-		err = sys_shmget(first, second, third);
+		err = sys_shmget(first, second_parm, third);
 		break;
 	case SHMCTL:
 		err = do_sys32_shmctl(first, second, (void *)AA(ptr));