>Jeff Garzik wrote: >> Do you know where there are some clear guidelines on the use of >> pointers in a structure passed to an ioctl to lessen (or bypass) >> 32<->64 compat ioctl thunking? > >Its impossible. If you pass pointers, you need to thunk. >(Not even passing pointers via sysfs can avoid this.) >Consider running a 32-bit app (with 32-bit pointers and 32-bit >ABI) on a 64-bit kernel. The drivers/scsi/megaraid/megaraid_mm.c simply calls regular ioctl from within the compat_ioctl, though it does copy to and from the userland pointers. This is done by adding appropriate padding. Sincerely, Sreenivas - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
