wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

[PATCH][next] wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

Posted by Gustavo A. R. Silva 2 years, 9 months ago

Zero-length arrays are deprecated, and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations alone in structs with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members alone in structs.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/288
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/net/wireless/ath/wil6210/wmi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wil6210/wmi.h b/drivers/net/wireless/ath/wil6210/wmi.h
index 9affa4525609..71bf2ae27a98 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.h
+++ b/drivers/net/wireless/ath/wil6210/wmi.h
@@ -2763,7 +2763,7 @@ struct wmi_rf_xpm_write_result_event {
 
 /* WMI_TX_MGMT_PACKET_EVENTID */
 struct wmi_tx_mgmt_packet_event {
-	u8 payload[0];
+	DECLARE_FLEX_ARRAY(u8, payload);
 } __packed;
 
 /* WMI_RX_MGMT_PACKET_EVENTID */
-- 
2.34.1

Re: [PATCH][next] wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

Posted by Kalle Valo 2 years, 8 months ago

"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote:

> Zero-length arrays are deprecated, and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length arrays
> declarations alone in structs with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for flexible-array members alone in structs.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/288
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> Reviewed-by: Simon Horman <simon.horman@corigine.com>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>

Patch applied to ath-next branch of ath.git, thanks.

27044b57f8a5 wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/ZGKHM+MWFsuqzTjm@work/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches

Re: [PATCH][next] wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

Posted by Kees Cook 2 years, 9 months ago

On Mon, May 15, 2023 at 01:25:39PM -0600, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated, and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length arrays
> declarations alone in structs with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for flexible-array members alone in structs.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/288
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook

Re: [PATCH][next] wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

Posted by Simon Horman 2 years, 9 months ago

On Mon, May 15, 2023 at 01:25:39PM -0600, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated, and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length arrays
> declarations alone in structs with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for flexible-array members alone in structs.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/288
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Reviewed-by: Simon Horman <simon.horman@corigine.com>