netdev - Re: [PATCH net-next] bpf: Fix compilation warning in __bpf_lru_list_rotate

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Message-Id: <20161116.113244.142339090478764244.davem@davemloft.net>
Date:   Wed, 16 Nov 2016 11:32:44 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     kafai@...com
Cc:     netdev@...r.kernel.org, ast@...com, daniel@...earbox.net,
        kernel-team@...com
Subject: Re: [PATCH net-next] bpf: Fix compilation warning in
 __bpf_lru_list_rotate_inactive

From: Martin KaFai Lau <kafai@...com>
Date: Tue, 15 Nov 2016 11:00:04 -0800

> gcc-6.2.1 gives the following warning:
> kernel/bpf/bpf_lru_list.c: In function ‘__bpf_lru_list_rotate_inactive.isra.3’:
> kernel/bpf/bpf_lru_list.c:201:28: warning: ‘next’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> 
> The "next" is currently initialized in the while() loop which must have >=1
> iterations.
> 
> This patch initializes next to get rid of the compiler warning.
> 
> Fixes: 3a08c2fd7634 ("bpf: LRU List")
> Reported-by: David Miller <davem@...emloft.net>
> Signed-off-by: Martin KaFai Lau <kafai@...com>

Applied.