linux-kernel - Re: [RFC] perf: fix building for ARCv1

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Message-ID: <C2D7FE5348E1B147BCA15975FBA23075F44C9E9A@IN01WEMBXA.internal.synopsys.com>
Date:	Mon, 19 Oct 2015 04:58:46 +0000
From:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:	Andi Kleen <andi@...stfloor.org>,
	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
CC:	Aabid Rushdi <Aabid.Rushdi@...opsys.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"linux-perf-users@...r.kernel.org" <linux-perf-users@...r.kernel.org>,
	"dvhart@...ux.intel.com" <dvhart@...ux.intel.com>,
	"dsahern@...il.com" <dsahern@...il.com>,
	"acme@...hat.com" <acme@...hat.com>
Subject: Re: [RFC] perf: fix building for ARCv1

On Monday 19 October 2015 04:45 AM, Andi Kleen wrote:
> Alexey Brodkin <Alexey.Brodkin@...opsys.com> writes:
>> So the best we may do is to implement detection of atomics in the toolchain and if there's no atomics hard stop with
>> perf building.
> If your target is single cpu only you can always simulate them in C.
>
> -Andi

But this user space - so IMHO UP/SMP doesn't matter and we can't simulate them in
C just by itself.

-Vineet
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