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> -----Original Message-----
> From: Tabi Timur-B04825
> Sent: Friday, February 24, 2012 10:46 AM
> To: Li Yang-R58472
> Cc: Huang Changming-R66093; galak@...;
> benh@...; Wood Scott-B07421; linuxppc-dev@... > Subject: Re: [PATCH] powerpc/85xx: allow CONFIG_PHYS_64BIT to be
> Li Yang-R58472 wrote:
> > I agree with Changming that we shouldn't setting PHYS_64BIT by default.
> The default kernel should always be the compatible with as much as
> possible. Disabling PHYS_64BIT by default means that the default kernel
> will not work with a 36-bit DTS. If you attempt to boot such a kernel
> with a 36-bit DTS, there will be no text output. Most people will not
> know why it's not working.
> So the safest option is for PHYS_64BIT to be enabled by default. That
> way, the kernel will always work.
Even though the user still need to know the addressing mode that u-boot is using. It won't work if the addressing mode of u-boot and device tree are different.