From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH v7 tip 3/8] tracing: allow BPF programs to call
 bpf_ktime_get_ns()
Date: Thu, 19 Mar 2015 11:41:45 -0400
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To: Alexei Starovoitov <ast@plumgrid.com>
Cc: Ingo Molnar <mingo@kernel.org>, Namhyung Kim <namhyung@kernel.org>, Arnaldo Carvalho de Melo <acme@infradead.org>, Jiri Olsa <jolsa@redhat.com>, Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>, "David S. Miller" <davem@davemloft.net>, Daniel Borkmann <daniel@iogearbox.net>, Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-api@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org
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On Thu, 19 Mar 2015 08:38:05 -0700
Alexei Starovoitov <ast@plumgrid.com> wrote:

> > Hmm, a nanosecond value returned as integer? Is there a way to make
> > this a 64 bit return type, or is RET_INTEGER default to 64 bits in BPF
> > functions?
> 
> RET_INTEGER doesn't mean C 'int' width. It means non-pointer and
> non-void value. The return value is always promoted to full
> register width which is 64-bit.
> 

OK.

Reviewed-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve