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Date:   Mon, 23 Jul 2018 08:30:06 -0500
From:   Josh Poimboeuf <jpoimboe@redhat.com>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Ingo Molnar <mingo@kernel.org>,
        Prashant Bhole <bhole_prashant_q7@lab.ntt.co.jp>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf/x86/intel: Fix unwind errors from PEBS entries
 (mk-II)
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On Thu, Jul 19, 2018 at 11:19:54PM +0200, Peter Zijlstra wrote:
> --- a/include/uapi/linux/perf_event.h
> +++ b/include/uapi/linux/perf_event.h
> @@ -143,6 +143,8 @@ enum perf_event_sample_format {
>  	PERF_SAMPLE_PHYS_ADDR			= 1U << 19,
>  
>  	PERF_SAMPLE_MAX = 1U << 20,		/* non-ABI */
> +
> +	__PERF_SAMPLE_CALLCHAIN_EARLY		= 1UL << 63,

Given the kbuild test robot errors for building on 32-bit, looks like
the 63 needs to be changed to 31 so it fits in an int?

-- 
Josh