linux-kernel - Re: [PATCH 1/8] bpf: Add missing annotations for __bpf_prog_enter() and __bpf_prog

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Date:   Fri, 13 Mar 2020 20:49:03 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jules Irenge <jbi.octave@...il.com>, boqun.feng@...il.com
Cc:     linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>
Subject: Re: [PATCH 1/8] bpf: Add missing annotations for __bpf_prog_enter()
 and __bpf_prog_exit()

On 3/11/20 2:09 AM, Jules Irenge wrote:
> Sparse reports a warning at __bpf_prog_enter() and __bpf_prog_exit()
> 
> warning: context imbalance in __bpf_prog_enter() - wrong count at exit
> warning: context imbalance in __bpf_prog_exit() - unexpected unlock
> 
> The root cause is the missing annotation at __bpf_prog_enter()
> and __bpf_prog_exit()
> 
> Add the missing __acquires(RCU) annotation
> Add the missing __releases(RCU) annotation
> 
> Signed-off-by: Jules Irenge <jbi.octave@...il.com>

Applied this one to bpf-next, thanks!