linux-kernel - Re: [PATCH v2 net-next] bpf: fix bpf_perf_event

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Message-ID: <5628807C.3040305@plumgrid.com>
Date:	Wed, 21 Oct 2015 23:21:48 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	"Wangnan (F)" <wangnan0@...wei.com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	He Kuang <hekuang@...wei.com>, Kaixu Xia <xiakaixu@...wei.com>,
	Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next] bpf: fix bpf_perf_event_read() helper

On 10/21/15 10:31 PM, Wangnan (F) wrote:
>> +    if ((attr->type != PERF_TYPE_RAW &&
>> +         !(attr->type == PERF_TYPE_SOFTWARE &&
>> +           attr->config == PERF_COUNT_SW_BPF_OUTPUT) &&
>> +         attr->type != PERF_TYPE_HARDWARE) ||
>> +        attr->inherit) {
>
> This 'if' statement is so complex. What about using a inline function
> instead?

hmm. don't see how inline function will help readability.

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