From: Simon Horman <simon.horman@corigine.com>
To: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Felix Fietkau <nbd@nbd.name>,
Lorenzo Bianconi <lorenzo@kernel.org>,
Ryder Lee <ryder.lee@mediatek.com>,
Shayne Chen <shayne.chen@mediatek.com>,
Sean Wang <sean.wang@mediatek.com>, Kalle Valo <kvalo@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH][next] wifi: mt76: mt7921: Replace fake flex-arrays with flexible-array members
Date: Mon, 20 Mar 2023 20:48:22 +0100 [thread overview]
Message-ID: <ZBi4hv5Q6lp2ooSV@corigine.com> (raw)
In-Reply-To: <ZBizeZ5DaBT5KKXN@work>
On Mon, Mar 20, 2023 at 01:26:49PM -0600, Gustavo A. R. Silva wrote:
> On Mon, Mar 20, 2023 at 03:56:54PM +0100, Simon Horman wrote:
> > > struct mt7921_asar_cl {
> > > @@ -85,7 +85,7 @@ struct mt7921_asar_fg {
> > > u8 rsvd;
> > > u8 nr_flag;
> > > u8 rsvd1;
> > > - u8 flag[0];
> > > + u8 flag[];
> >
> > I am curious to know why DECLARE_FLEX_ARRAY isn't used here.
>
> In contrast to the other structs, there is no object of type struct
> mt7921_asar_fg declared in a union:
>
> 91 struct mt7921_acpi_sar {
> 92 u8 ver;
> 93 union {
> 94 struct mt7921_asar_dyn *dyn;
> 95 struct mt7921_asar_dyn_v2 *dyn_v2;
> 96 };
> 97 union {
> 98 struct mt7921_asar_geo *geo;
> 99 struct mt7921_asar_geo_v2 *geo_v2;
> 100 };
> 101 struct mt7921_asar_cl *countrylist;
> 102 struct mt7921_asar_fg *fg;
> 103 };
>
> The DECLARE_FLEX_ARRAY() helper was created to declare flex-array members
> in unions or alone in structs[1].
Thanks for the clarification, much appreciated.
FWIIW, with this information I'm happy with this patch.
Reviewed-by: Simon Horman <simon.horman@corigine.com>
next prev parent reply other threads:[~2023-03-20 19:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 20:56 [PATCH][next] wifi: mt76: mt7921: Replace fake flex-arrays with flexible-array members Gustavo A. R. Silva
2023-03-20 14:56 ` Simon Horman
2023-03-20 19:26 ` Gustavo A. R. Silva
2023-03-20 19:48 ` Simon Horman [this message]
2023-03-30 20:11 ` Gustavo A. R. Silva
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