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SubjectRe: [PATCH v2 2/2] r8169: Avoid pointer aliasing
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On Mon, 2019-02-04 at 19:20 -0800, David Miller wrote:
> From: Thierry Reding <thierry.reding@gmail.com>
> Date: Mon, 4 Feb 2019 17:42:13 +0100
>
> > @@ -7316,7 +7325,7 @@ static int rtl_get_ether_clk(struct rtl8169_private *tp)
> > static int rtl_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> > {
> > const struct rtl_cfg_info *cfg = rtl_cfg_infos + ent->driver_data;
> > - u8 mac_addr[ETH_ALEN] __aligned(4) = {};
> > + u8 mac_addr[ETH_ALEN] = {};
> > struct rtl8169_private *tp;
>
> I agree with Heiner, you have to provide at least 2 byte alignment for this
> buffer due to the reasons he stated.

It's declared after a pointer so it is already is 2 byte aligned.

A lot of drivers wouldn't work otherwise.


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