linux-kernel - Re: [PATCH] staging: rtl8192e, rtl8192u: use correct notation to define pointer

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Message-ID: <20201028044232.qtzsnrrh7xgdzsoc@ltop.local>
Date:   Wed, 28 Oct 2020 05:42:32 +0100
From:   Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     Muhammad Usama Anjum <musamaanjum@...il.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8192e, rtl8192u: use correct notation to
 define pointer

On Tue, Oct 27, 2020 at 12:23:03PM +0100, Greg KH wrote:
> 
> Are you sure these changes are correct?  This isn't just a list of
> structures after this at the end of the structure?
> 
> Please look at commit 5979afa2c4d1 ("staging: Replace zero-length array
> with flexible-array member") which made most of these flexible arrays.
> 
> This is not a pointer, it really is an array, I think sparse is really
> wrong here, be careful.

Sparse's warning is not about changing the definition of this member
as if it was the argument of a function. It's about how can you use
an array of structure when this structure has a flexible member.
It's a recent warning, added purposely to catch this.
See https://lore.kernel.org/r/CAHk-=wgJZ05ap8VQdzWDWJVWVtZiOYTc6cnNB8gNeQzEnfm-tw@mail.gmail.com

-- Luc