From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Subject: Re: [PATCH bpf-next v2] bpf: Allow bpf_current_task_under_cgroup in
 interrupt
Date: Sun, 29 Apr 2018 09:20:58 -0700
Message-ID: <20180429162057.7e4ofw7olx7hpris@ast-mbp>
References: <20180428073235.3917719-1-qinteng@fb.com>
 <20180429063929.206386-1-qinteng@fb.com>
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Cc: netdev@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net,
        yhs@fb.com, kernel-team@fb.com
To: Teng Qin <qinteng@fb.com>
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On Sat, Apr 28, 2018 at 11:39:29PM -0700, Teng Qin wrote:
> Currently, the bpf_current_task_under_cgroup helper has a check where if
> the BPF program is running in_interrupt(), it will return -EINVAL. This
> prevents the helper to be used in many useful scenarios, particularly
> BPF programs attached to Perf Events.
> 
> This commit removes the check. Tested a few NMI (Perf Event) and some
> softirq context, the helper returns the correct result.
> 
> Signed-off-by: Teng Qin <qinteng@fb.com>

Applied, Thanks Teng.