linux-kernel - Re: [PATCH net-next] net: sysctl: cleanup net_sysctl

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Message-ID: <20210106163056.79d75ffa@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Wed, 6 Jan 2021 16:30:56 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alexander Lobakin <alobakin@...me>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: sysctl: cleanup net_sysctl_init()

On Wed, 06 Jan 2021 20:40:28 +0000 Alexander Lobakin wrote:
> 'net_header' is not used outside of this function, so can be moved
> from BSS onto the stack.
> Declarations of one-element arrays are discouraged, and there's no
> need to store 'empty' in BSS. Simply allocate it from heap at init.

Are you sure? It's passed as an argument to register_sysctl()
so it may well need to be valid for the lifetime of net_header.