Re: [PATCH] MIPS: Make the default for PHYSICAL_START always 64-bit

[James Hogan <jhogan@kernel.org>]

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On Mon, Mar 26, 2018 at 07:11:51PM +0100, Maciej W. Rozycki wrote:
> Make the default for PHYSICAL_START always 64-bit, ensuring that a 
> correct sign-extended value is used if a 32-bit image is loaded by a 
> 64-bit system, and matching how the load address is set in platform 
> Makefile fragments (arch/mips/*/Platform) in the absence of the 
> PHYSICAL_START configuration option.

This looks correct given the defaults in the Makefile fragments. However
I presume a 32BIT kernel will produce a 32-bit ELF, in which case the
result will be indistinguishable? For other kernel image formats which
always use 64-bit pointers perhaps it matters more (if they can be
loaded by kexec-tools). uImage is 32-bit ISTR, and our ITB stuff seems
to only use 32bit addresses for CONFIG_32BIT. I don't now about other
formats.

So unless I hear otherwise I'll probably drop the stable tag and apply
for 4.17.

Thanks
James

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