[PATCH v4 3/8] arm64/fpsimdmacros: Allow the macro "for" to be used in more cases

Mark Brown broonie at kernel.org
Tue Sep 22 09:59:56 EDT 2020

On Tue, Sep 22, 2020 at 02:51:41PM +0100, Dave Martin wrote:
> On Mon, Sep 21, 2020 at 07:09:10PM +0100, Mark Brown wrote:

> > Yes, this was my understanding of what this was doing when I looked
> > through things when taking over the code - if we're going to use a
> > different macro mode to the rest of the code then it seems sensible to
> > make sure we don't try to build any other code with that macro mode
> > otherwise it'll doubtless blow up in our faces at some point.

> I think that it's unlikely ever to be used except for this kind of
> purpose, since it doesn't offer much over normal macro mode.

> altmacro mode is off by default, and can't be turned on via command-line
> options IIRC, so it seems unlikely to be turned on everywhere by
> accident.

Right, the issue is that if altmacro mode expansions pull in something
that misbehaves when interpreted using altmacro mode that'd cause
trouble so usages like this should take care to ensure that only code
specifically writen for altmacro mode gets interpreted using it.
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