linux-kernel - Re: [PATCH 2/2] bpf: btf: remove a couple conditions

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Message-ID: <20180427172023.6japncdd3nbqauzn@kafai-mbp>
Date:   Fri, 27 Apr 2018 10:20:25 -0700
From:   Martin KaFai Lau <kafai@...com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
CC:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel-janitors@...r.kernel.org>
Subject: Re: [PATCH 2/2] bpf: btf: remove a couple conditions

On Fri, Apr 27, 2018 at 05:04:59PM +0300, Dan Carpenter wrote:
> We know "err" is zero so we can remove these and pull the code in one
> indent level.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Thanks for the simplification!

Acked-by: Martin KaFai Lau <kafai@...com>

> ---
> This applies to the BPF tree (linux-next)
> 
> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
> index e631b6fd60d3..7cb0905f37c2 100644
> --- a/kernel/bpf/btf.c
> +++ b/kernel/bpf/btf.c
> @@ -1973,16 +1973,14 @@ static struct btf *btf_parse(void __user *btf_data, u32 btf_data_size,
>  	if (err)
>  		goto errout;
>  
> -	if (!err && log->level && bpf_verifier_log_full(log)) {
> +	if (log->level && bpf_verifier_log_full(log)) {
>  		err = -ENOSPC;
>  		goto errout;
>  	}
>  
> -	if (!err) {
> -		btf_verifier_env_free(env);
> -		btf_get(btf);
> -		return btf;
> -	}
> +	btf_verifier_env_free(env);
> +	btf_get(btf);
> +	return btf;
>  
>  errout:
>  	btf_verifier_env_free(env);