Re: build fix for x86_64...

[H. Peter Anvin]

Luck, Tony wrote:
> 
> Which is better.  But if we unconditionally set this CONFIG variable, then the
> code in fs/quota.c will have to read:
> 
> #if defined(CONFIG_COMPAT) && defined(CONFIG_COMPAT_FOR_U64_ALIGNMENT)
> 
> We can keep it simpler if the Kconfig file does the conditional for us:
> 
> config COMPAT_FOR_U64_ALIGNMENT
> 	def_bool y
> 	depends on COMPAT
> 

No, that would be bad.  If compat_u64 is used to carry 32-bit ABIs
forward into 64-bit space without needing compatibility hacks, then this
would actually introduce ABI incompatibilities depending on CONFIG_COMPAT!

	-hpa
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