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Date: Tue, 7 Apr 2015 17:26:10 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: David Ahern <dsahern@gmail.com>
Cc: acme@kernel.org, linux-kernel@vger.kernel.org,
        Frederic Weisbecker <fweisbec@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH] perf tool: Fix type for references to data_head/tail
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On Tue, Apr 07, 2015 at 09:20:37AM -0600, David Ahern wrote:
> data_head and data_tail are defined as __u64 in linux/perf_event.h,
> but perf userspace uses int and unsigned int. Convert all references
> to u64 for consistency.

Ack on that. I suspect this is because >2G mmap()s are a tad silly, but
yes its good to fix that.