linux-kernel - Re: [PATCH][next] hpilo: Replace one-element array with flexible-array member

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Message-ID: <20200714161948.GA2092551@kroah.com>
Date:   Tue, 14 Jul 2020 18:19:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] hpilo: Replace one-element array with
 flexible-array member

On Tue, Jul 14, 2020 at 10:44:49AM -0500, Gustavo A. R. Silva wrote:
> There is a regular need in the kernel to provide a way to declare
> having a dynamically sized set of trailing elements in a structure.
> Kernel code should always use “flexible array members”[1] for these
> cases. The older style of one-element or zero-length arrays should
> no longer be used[2].
> 
> For this particular case, it is important to notice that the cachelines
> change from 7 to 6 after the flexible-array conversion:

That's really funny to see.  Nice work, I'll go queue this up.  I doubt
anyone will notice as this is a very old driver :)

thanks,

greg k-h