Re: [PATCH v2] ath6kl: replace one-element array with flexible-array member

From: Greg KH
Date: Fri Aug 04 2023 - 05:31:21 EST


On Fri, Aug 04, 2023 at 10:10:37AM +0300, Kalle Valo wrote:
> Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> writes:
>
> > On Thu, Aug 03, 2023 at 09:55:54PM -0700, Atul Raut wrote:
> >
> >> One-element arrays are no longer relevant, and their
> >> place has been taken by flexible array members thus,
> >> use a flexible-array member to replace the one-element
> >> array in struct ath6kl_usb_ctrl_diag_cmd_write
> >>
> >> This fixes warnings such as:
> >> ./drivers/net/wireless/ath/ath6kl/usb.c:109:8-12: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> >>
> >> Signed-off-by: Atul Raut <rauji.raut@xxxxxxxxx>
> >> ---
> >> drivers/net/wireless/ath/ath6kl/usb.c | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/net/wireless/ath/ath6kl/usb.c b/drivers/net/wireless/ath/ath6kl/usb.c
> >> index 5220809841a6..c8ecc9e85897 100644
> >> --- a/drivers/net/wireless/ath/ath6kl/usb.c
> >> +++ b/drivers/net/wireless/ath/ath6kl/usb.c
> >> @@ -106,7 +106,7 @@ struct ath6kl_usb_ctrl_diag_cmd_write {
> >> __le32 cmd;
> >> __le32 address;
> >> __le32 value;
> >> - __le32 _pad[1];
> >> + __le32 _pad[];
> >
> > Are you sure this is actually a variable length array?
>
> It's not, it's just padding. We both told this in v1:
>
> https://patchwork.kernel.org/project/linux-wireless/patch/20230731012941.21875-1-rauji.raut@xxxxxxxxx/

Hey, I'm consistent, nice! :)

But Atul, that's not good to ignore our review comments. Usually that
ends up meaning that everyone will then just ignore your submissions,
generally a not-good resolution.

thanks,

greg k-h