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[next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

Message ID YzIvzc0jsYLigO8a@work (mailing list archive)
State Mainlined
Commit 56df3d408a8fa079bf4122895d6e004659795d4f
Headers show
Series [next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper | expand

Commit Message

Gustavo A. R. Silva Sept. 26, 2022, 11:03 p.m. UTC
Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members in unions.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/223
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/net/wireless/intel/iwlegacy/commands.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Kees Cook Sept. 27, 2022, 2:31 a.m. UTC | #1
On Mon, Sep 26, 2022 at 06:03:41PM -0500, 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 in anonymous union with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for flexible-array members in unions.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/223
> 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>
Kalle Valo Sept. 28, 2022, 6:45 a.m. UTC | #2
"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 in anonymous union with the new DECLARE_FLEX_ARRAY()
> helper macro.
> 
> This helper allows for flexible-array members in unions.
> 
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/223
> 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>

Patch applied to wireless-next.git, thanks.

56df3d408a8f iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlegacy/commands.h b/drivers/net/wireless/intel/iwlegacy/commands.h
index 4a97310f8fee..28cf4e832152 100644
--- a/drivers/net/wireless/intel/iwlegacy/commands.h
+++ b/drivers/net/wireless/intel/iwlegacy/commands.h
@@ -1710,7 +1710,7 @@  struct il4965_tx_resp {
 	 */
 	union {
 		__le32 status;
-		struct agg_tx_status agg_status[0];	/* for each agg frame */
+		DECLARE_FLEX_ARRAY(struct agg_tx_status, agg_status);	/* for each agg frame */
 	} u;
 } __packed;
 
@@ -3365,7 +3365,7 @@  struct il_rx_pkt {
 		struct il_compressed_ba_resp compressed_ba;
 		struct il_missed_beacon_notif missed_beacon;
 		__le32 status;
-		u8 raw[0];
+		DECLARE_FLEX_ARRAY(u8, raw);
 	} u;
 } __packed;