* [PATCH][next] net/mlx5e: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
@ 2022-09-26 21:50 Gustavo A. R. Silva
2022-09-26 22:02 ` Kees Cook
0 siblings, 1 reply; 2+ messages in thread
From: Gustavo A. R. Silva @ 2022-09-26 21:50 UTC (permalink / raw)
To: Saeed Mahameed, Leon Romanovsky, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni
Cc: netdev, linux-rdma, linux-kernel, Gustavo A. R. Silva, linux-hardening
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/222
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/en_tc.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
index 48241317a535..0db41fa4a9a6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.h
@@ -97,8 +97,8 @@ struct mlx5_flow_attr {
} lag;
/* keep this union last */
union {
- struct mlx5_esw_flow_attr esw_attr[0];
- struct mlx5_nic_flow_attr nic_attr[0];
+ DECLARE_FLEX_ARRAY(struct mlx5_esw_flow_attr, esw_attr);
+ DECLARE_FLEX_ARRAY(struct mlx5_nic_flow_attr, nic_attr);
};
};
--
2.34.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] net/mlx5e: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
2022-09-26 21:50 [PATCH][next] net/mlx5e: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper Gustavo A. R. Silva
@ 2022-09-26 22:02 ` Kees Cook
0 siblings, 0 replies; 2+ messages in thread
From: Kees Cook @ 2022-09-26 22:02 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Saeed Mahameed, Leon Romanovsky, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, netdev, linux-rdma, linux-kernel,
linux-hardening
On Mon, Sep 26, 2022 at 04:50:42PM -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/222
> 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
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2022-09-26 22:03 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-26 21:50 [PATCH][next] net/mlx5e: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper Gustavo A. R. Silva
2022-09-26 22:02 ` Kees Cook
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).