Subject: Re: [PATCH 2/3] powerpc: fix build errors

From: Segher Boessenkool <[email-masked]>
Date: Thu, 24 Feb 2022 11:37:13 -0600

On Thu, Feb 24, 2022 at 11:39:16PM +1100, Michael Ellerman wrote:
> >  	/* Calculate the parity of the value */
> > -	asm ("popcntd %0,%1" : "=r" (parity) : "r" (val));
> > +	asm (".machine \"push\"\n"
> > +	     ".machine \"power7\"\n"
> > +	     "popcntd %0,%1\n"
> > +	     ".machine \"pop\"\n"
> > +	     : "=r" (parity) : "r" (val));
> 
> This was actually present in an older CPU, but it doesn't really matter,
> this is fine.

popcntd was new on p7 (popcntb is the older one :-) )  And it does not
matter indeed.

Segher