[PATCH needed?] ARM: add missing HAVE_KERNEL_GZIP

[PATCH needed?] ARM: add missing HAVE_KERNEL_GZIP

[Guennadi Liakhovetski]

Kernel fails to uncompress itself and boot without this patch.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---

No idea if this is the correct or even needed fix. I did observe a failure 
to boot with a post 2.6.31 kernel about two weeks ago without this patch 
(from u-boot), but it might well have become irrelevant by now.

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index aef63c8..fca630e 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -18,6 +18,7 @@ config ARM
 	select HAVE_KRETPROBES if (HAVE_KPROBES)
 	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
 	select HAVE_GENERIC_DMA_COHERENT
+	select HAVE_KERNEL_GZIP
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and

[PATCH needed?] ARM: add missing HAVE_KERNEL_GZIP

[Uwe Kleine-König]

Hi Guennadi,

On Mon, Sep 28, 2009 at 09:21:35AM +0200, Guennadi Liakhovetski wrote:
> Kernel fails to uncompress itself and boot without this patch.
I have no problem booting yesterday's linus/master without that change.

What is the exact problem you see?

Best regards
Uwe

-- 
Pengutronix e.K.                              | Uwe Kleine-K?nig            |
Industrial Linux Solutions                    | http://www.pengutronix.de/  |

[PATCH needed?] ARM: add missing HAVE_KERNEL_GZIP

[Guennadi Liakhovetski]

On Mon, 28 Sep 2009, Uwe Kleine-K?nig wrote:

> Hi Guennadi,
> 
> On Mon, Sep 28, 2009 at 09:21:35AM +0200, Guennadi Liakhovetski wrote:
> > Kernel fails to uncompress itself and boot without this patch.
> I have no problem booting yesterday's linus/master without that change.
> 
> What is the exact problem you see?

Don't remember the error message exactly - something like "cannot 
uncompress" or "missing decompressor"... Observed on a i.MX31 system, 
although, if the problem were real, it probably would be present on all 
ARMs - none defines any of those decompressors. Will have to double-check 
then.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/

[PATCH needed?] ARM: add missing HAVE_KERNEL_GZIP

[Andy Green]

On 09/28/2009 08:56 AM, Somebody in the thread at some point said:
> On Mon, 28 Sep 2009, Uwe Kleine-K?nig wrote:
>
>> Hi Guennadi,
>>
>> On Mon, Sep 28, 2009 at 09:21:35AM +0200, Guennadi Liakhovetski wrote:
>>> Kernel fails to uncompress itself and boot without this patch.
>> I have no problem booting yesterday's linus/master without that change.
>>
>> What is the exact problem you see?
>
> Don't remember the error message exactly - something like "cannot
> uncompress" or "missing decompressor"... Observed on a i.MX31 system,
> although, if the problem were real, it probably would be present on all
> ARMs - none defines any of those decompressors. Will have to double-check
> then.

Just a comment on this, I run on an iMX device with an uncompressed 
kernel for a nice decrease in early boot time.  The kernel comes in at 
3MB uncompressed and the Qi bootloader I used pulls that in around half 
a second from uSD.

I use gzip for something else as it happens, but in the uncompressed 
case, boot is not dependent on gzip in the kernel.

-Andy