Tim Hockin wrote:
> Martin Schwidefsky wrote:
>
>>> It seems to me that if we do:
>>> * s390x defines CONFIG_UID16
>>> * typedef __kernel_old_gid_t to u16
>>> * get rid of all the sys32_*16 stuff and just call the uid16.c function
>>
>>
>> I checked the code and didn't find any reason why this shouldn't work.
>> In fact with the 31 bit emulation layer the 64 bit kernel does need the
>> 16 bit uid/gid system calls although only for the emulation. To make it
>> really perfect you could define CONFIG_UID16 dependent on
>> CONFIG_S390_SUPPORT. This saves a few bytes in the image if the emulation
>> support is not enabled.
Uggh, DaveM pointed out a very good issue with this fix (similar for
Sparc64) and core files. Core files will now have truncated uid/gid
values because fs/binfmt_elf calls NEW_TO_OLD_UID(). May be other
places, too.
I guess you should not apply this patch until I've had a better think
about it.
Tim
-- Tim Hockin Systems Software Engineer Sun Microsystems, Linux Kernel Engineering thockin@sun.com- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Sep 07 2002 - 22:00:22 EST