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

[Daniel Axtens]

>  	/* 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
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