linux-kernel - Re: [PATCH v2] scsi: fc: Avoid -Wflex-array-member-not-at-end warnings

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Message-ID: <yq13498feqz.fsf@ca-mkp.ca.oracle.com>
Date: Sat, 30 Aug 2025 21:43:02 -0400
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Justin Tee <justin.tee@...adcom.com>,
        James Smart
 <james.smart@...adcom.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        "Martin
 K. Petersen" <martin.petersen@...cle.com>,
        Hannes Reinecke
 <hare@...e.de>, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2] scsi: fc: Avoid -Wflex-array-member-not-at-end warnings


Gustavo,

> -Wflex-array-member-not-at-end has been introduced in GCC-14, and we
> are getting ready to enable it, globally.
>
> So, in order to avoid ending up with a flexible-array member in the
> middle of multiple other structs, we use the `__struct_group()` helper
> to create a new tagged `struct fc_df_desc_fpin_reg_hdr`. This
> structure groups together all the members of the flexible `struct
> fc_df_desc_fpin_reg` except the flexible array.

Applied to 6.18/scsi-staging, thanks!

-- 
Martin K. Petersen