On Tue, Jun 21, 2011 at 12:52:12PM +0530, Amit Mahajan wrote:
> On Tue, 2011-06-21 at 12:14 +0530, Avik Sil wrote:
> > On Tuesday 21 June 2011 12:06 PM, Amit Mahajan wrote:
> > > Hi,
> > > 
> > > I have booted panda board using 11.05 natty release of ubuntu. It worked
> > > great.
> > > 
> > > Now, I am trying to compile the kernel myself. I am using the sources
> > > from tarball provided on 11.05 release page as well as from linaro git
> > > 2.6.38 tree.
> > > 
> > > 
> > > I have extracted the .config from running ubuntu(of 11.05 LEB) and using
> > > it to compile my own kernels. Then I am just replacing the uImage on
> > > sdcard(generated using 11.05 LEB) by my compiled kernel.
> > > 
> > > Boot process goes fine till the init process but then it fails to bring
> > > on the graphics and goes to console mode.
> > > 
> > > Any help on this?
> > 
> > You may want to install modules on the SD card too:
> > 
> > make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi-
> > INSTALL_MOD_PATH=/media/rootfs modules_install
> 
> I am getting these errors while building the modules. I have linaro
> gcc-4.5.1. Is it related to older gcc?
> 
> 
>   AS      arch/arm/boot/compressed/lib1funcs.o
>   LD      arch/arm/boot/compressed/vmlinux
>   OBJCOPY arch/arm/boot/zImage
>   Kernel: arch/arm/boot/zImage is ready
> ERROR: "__aeabi_uldivmod" [sound/soc/codecs/snd-soc-wm8974.ko]
> undefined!
> ERROR: "__aeabi_uldivmod" [sound/soc/codecs/snd-soc-wm8940.ko]
> undefined!
> ERROR: "__aeabi_uldivmod" [sound/soc/codecs/snd-soc-wm8510.ko]
> undefined!
> WARNING: modpost: Found 2 section mismatch(es).
> To see full details build your kernel with:
> 'make CONFIG_DEBUG_SECTION_MISMATCH=y'
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2

John, do you know why the packaged kernel builds don't get these errors?

I do tend to get this whenever I try to build a full set of kernel from
the packaged kernel config.  I haven't reproduced it recently though, so
I don't know exactly what tool versions are affected.

Doing long long divisions anywhere in the kernel is apparently
considered wrong, but in this instance it may be a compiler bug that is
leaving a stray reference to the division helper in the code:

http://thread.gmane.org/gmane.linux.alsa.devel/84361/focus=115079

I don't know if anything has been done about this.

Cheers
---Dave


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