Subject: Re: [PATCH V8 04/10] powerpc, perf: Re organize PMU based branch filter processing in POWER8

From: Daniel Axtens <[email-masked]>
Date: Wed, 10 Jun 2015 15:07:02 +1000

>  	/* Every thing else is unsupported */
>  	return -1;
You're returning -1 as a unsigned 64bit number. Other code that reads
this value tests for -1 and I think it works everywhere just because it
wraps around consistently. But I would still rather not do this and I'm
surprised it doesn't throw a warning.

Regards,
Daniel