[PATCH] arm64/sve: Document that __SVE_VQ_MAX is much larger than needed

[Mark Brown]

On Wed, Feb 07, 2024 at 01:39:13PM +0000, Dave Martin wrote:

> How about something along the lines of:

> /*
>  * Yes, this is 512 QUADWORDS.
>  * To help ensure forward portability, this is much larger than the
>  * current maximum value defined by the SVE architecture.
>  * While arrays or static allocations can be sized based on this value,
>  * watch out!  It will waste a surprisingly large amount of memory.
>  * Dynamic sizing based on the actual runtime vector length is likely to
>  * be preferable for most purposes.
>  */

That works for me.  The cost of initialising can also add up in
emulation.
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