[yocto] custom linux kernel recipe

[Mircea Gliga]

Thanks Bruce for your help!

It works now, with the defconfig from 4.8.

Have a nice day !
Mircea

On 09/02/2016 06:26 PM, Bruce Ashfield wrote:
> On 2016-09-02 09:58 AM, Bruce Ashfield wrote:
>> On 2016-09-02 03:51 AM, Mircea Gliga wrote:
>>> Hi Bruce,
>>>
>>> Do you have any new input in regards with qemuarm booting with kernel
>>> 4.7.2 LTS ?
>>> Have you managed to test this ?
>>> I wander if this can be reproduce elsewhere and what's the solution
>>> for it.
>>
>> I was tied up with the introduction of the 4.8 kernel, but I *think*
>> the coast is clear on that front (for the moment).
>>
>> I can try and spin up a korg based 4.7.x build and see how it goes.
>
> The issue is in your defconfig.
>
> qemuarm login: root
> root at qemuarm:~# uname -a
> Linux qemuarm 4.7.2-yocto-standard #1 PREEMPT Fri Sep 2 11:15:30 EDT 
> 2016 armv5tejl GNU/Linux
> root at qemuarm:~#
>
> I created a similar recipe:
>
> --------
> inherit kernel
>
> require recipes-kernel/linux/linux-yocto.inc
>
> FILESEXTRAPATHS_prepend := "${THISDIR}/linux-stable:"
>
> KBRANCH ?= "linux-4.7.y"
>
> SRCREV ?= "84fae3f89282ce86a0c0da30e35fe66dbcadda6f"
>
> KBRANCH ?= "linux-4.7.y"
> SRCREV_machine_qemuarm ?= "84fae3f89282ce86a0c0da30e35fe66dbcadda6f"
>
> KERNEL_DEVICETREE_qemuarm = "versatile-pb.dtb"
>
> KBRANCH_qemuarm ?= "linux-4.7.y"
>
> SRC_URI = 
> "git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git;bareclone=1;branch=${KBRANCH}"
>
> SRC_URI += "file://defconfig"
>
> LINUX_VERSION = "4.7.2"
> PV = "${LINUX_VERSION}+git${SRCPV}"
>
> COMPATIBLE_MACHINE = "qemuarm"
>
> ----------
>
> And I took the "defconfig" from the -stable tree (the 
> defconfig_versatile).
>
> When I built and booted that, I had no output.
>
> So I grabbed the .config from my 4.8 build, copied it into my layer
> as the 'defconfig', rebuilt .. and was able to log in with the prompt
> you see above.
>
> So the 4.7 defconfig is missing something, I didn't iterate to find
> it.
>
> Cheers,
>
> Bruce
>
>
>>
>> Bruce
>>
>>>
>>> Thanks
>>> Mircea
>>>
>>> On 08/30/2016 06:09 PM, Bruce Ashfield wrote:
>>>>
>>>> I'm finishing up 4.8 today, but without doing a boot test, I can't say
>>>> for sure. I'll see if I can cycle in some korg 4.7.x testing 
>>>> tomorrow to
>>>> see if I can get a clean boot.
>>>
>>
>