Re: [PATCH 4/6] Add support for LZO-compressed kernels for ARM

Alain Knaff
2009-08-07T09:58:18Z

On 08/07/09 11:24, Albin Tonnerre wrote:
> On Thu, Aug 06, 2009 at 11:40:55PM +0100, Russell King - ARM Linux wrote :
>> On Mon, Aug 03, 2009 at 04:58:19PM +0200, Albin Tonnerre wrote:
>>> This is the second part of patch. This part includes:
>>> - changes to ach/arch/boot/Makefile to make it easier to add new
>>> compression types
>>> - new piggy.lzo.S necessary for lzo compression
>>> - changes in arch/arm/boot/compressed/misc.c to allow the use of lzo or
>>> gzip, depending on the config
>>> - Kconfig support
>
>> FYI, with these patches applied and selecting GZIP method, I get
>> linker errors. I've been unable to track down what's going on, but
>> it appears to be a libgcc issue.
>
>> In spite of the decompressor being built as an EABI object, gcc seems
>> to be issuing calls to __umodsi3, which isn't in the EABI libgcc
>> (they're called something different - don't ask.)
>
> I also happen to have issues related to the linker not finding __aeabi_uidivmod,
> but only when compiling with CONFIG_CC_OPTIMIZE_FOR_SIZE. Is it similar for you,
> or does it also fail when compiling with -O2 ?
>
>> So I think these patches need further testing and evaluation on ARM
>> before they can be merged. Moreover, I'd like to see some comparisons
>> between the _current_ gzip method, the new gzip method and the lzo
>> method on ARM.
>
> I don't have my ARM platforms at hand, but I'll so these comparisons in a couple
> days when I access to them again.
>
> Regards,

Could it be that the patches that remove division (zutil.h and inflate.c)
have somehow not been applied?

Regards,

Alain