David, Your patch to remove the broken sys32_ipc stub eliminated the hang I reported (using hdparm on a kernel compiled with gcc-4.2.0). Thanks. /Mikael - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html