Re: kernel compilation failure on power7 system

[CAI Qian]

Please ignore this as this turned out some unclean bits rendered
the result unstable. It is now passed the complication testing. 

----- Original Message -----
> From: "CAI Qian" <caiqian@xxxxxxxxxx>
> To: "Mihai Caraman" <mihai.caraman@xxxxxxxxxxxxx>, "Benjamin Herrenschmidt" <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx, "linux-kernel" <linux-kernel@xxxxxxxxxxxxxxx>
> Sent: Monday, December 31, 2012 11:33:19 AM
> Subject: kernel compilation failure on power7 system
> 
> Stable kernel 3.7.1 failure to compile on power7 system here,
> 
> arch/powerpc/kvm/built-in.o: In function `hdec_soon':
> /root/linux-stable/arch/powerpc/kvm/book3s_hv_rmhandlers.S:1068:
> undefined reference to `PACA_SPRG3'
> make: *** [vmlinux] Error 1
> 
> reverted this commit fixed the problem,
> -----
> 0127262c01f0beb485f917c720d1d95d165dfdbf
> [PATCH] powerpc: Restore VDSO information on critical exception om
>  BookE
> 
> Critical exception on 64-bit booke uses user-visible SPRG3 as
> scratch.
> Restore VDSO information in SPRG3 on exception prolog.
> 
> Use a common sprg3 field in PACA for all powerpc64 architectures.
> -----
> 
> Used this config - http://people.redhat.com/qcai/stable/config-ppc
> 
> system information here,
> # cat /proc/device-tree/model
> IBM,8231-E2B
> 
> CAI Qian
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