linux-kernel - Re: [PATCH] RDMA: Replace zero-length array with flexible-array member

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Message-ID: <20220401115039.GO64706@ziepe.ca>
Date:   Fri, 1 Apr 2022 08:50:39 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     cgel.zte@...il.com
Cc:     mike.marciniszyn@...nelisnetworks.com,
        dennis.dalessandro@...nelisnetworks.com,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lv Ruyi <lv.ruyi@....com.cn>, Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] RDMA: Replace zero-length array with flexible-array
 member

On Fri, Apr 01, 2022 at 07:54:06AM +0000, cgel.zte@...il.com wrote:
> From: Lv Ruyi <lv.ruyi@....com.cn>
> 
> 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].

If I recall properly this doesn't work if the flex array is nested
inside another member.. Not sure what this thinks it is doing anyhow

Jason