[RFC 2/2] perf/core: change errno for sampling event not supported in hardware

[Vineet Gupta]

On Friday 13 May 2016 04:34 AM, Vince Weaver wrote:
> On Thu, 12 May 2016, Peter Zijlstra wrote:
> 
>> Ah.. which might be a hint that nobody is actually explicitly testing
>> for this and we might just get away with changing the ABI.
>>
>> Vince, what say you; shall we try and get away with it? ;-)
> 
> It's probably worth trying.
> 
> The only other time anyone else noticed was in this thread
> 	https://lkml.org/lkml/2015/6/11/136
> and I think the conclusion at the end of that was also that it's probably 
> worth changing.

I presume that the RFC patches I posted are fine or do we want any changes.