PowerPC 85xx board are caused die by Commit: 864b9e6fd76489aab422bac62162f57c52e06ed8(powerpc: Use lwarx/ldarx hint in bit locks)

[Andrew Liu]

Just validated it, this fix can make fsl_p2020ds work again.

Andrew

On Thu, Mar 11, 2010 at 1:39 PM, Kumar Gala <galak at kernel.crashing.org>wrote:

>
> On Mar 10, 2010, at 11:20 PM, Kumar Gala wrote:
>
> >
> > On Mar 10, 2010, at 9:20 PM, Andrew Liu wrote:
> >
> >> Hi Guys:
> >> I have done several experiments on  fsl_8548cds and fsl_p2020rdb,
> pinpointed the commit: 864b9e6fd76489aab422bac62162f57c52e06ed8(powerpc: Use
> lwarx/ldarx hint in bit locks)  cause the bootup stalledd.
> >>
> >> "
> >> Filename 'fsl_8548cds/uImage'.
> >> Load address: 0x1000000
> >> Loading:
> #################################################################
> >>     #######################################
> >> done
> >> Bytes transferred = 1526546 (174b12 hex)
> >> Speed: 100, full duplex
> >> Using eTSEC0 device
> >> Filename 'sliu/fsl_8548cds/mpc8548cds.dtb'.
> >> Load address: 0xc00000
> >> Loading: #
> >> done
> >> Bytes transferred = 9993 (2709 hex)
> >> ## Booting image at 01000000 ...
> >>   Image Name:   Linux-2.6.34-rc1-00005-g522dba7
> >>   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
> >>   Data Size:    1526482 Bytes =  1.5 MB
> >>   Load Address: 00000000
> >>   Entry Point:  00000000
> >>   Verifying Checksum ... OK
> >>   Uncompressing Kernel Image ... OK
> >>   Booting using the fdt at 0xc00000
> >>   Loading Device Tree to 007fb000, end 007fd708 ... OK
> >> "
> >>
> >> I guess all 85xx or booke board has this issue.
> >
> > that's very odd since __PPC_EH should be ignored on PPC32 and thus 85xx.
>
> Found the issue and posted a fix.
>
> - k
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