netdev - [PATCH][next] net/fungible: Avoid -Wflex-array-member-not-at-end warning

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Message-ID: <ZrDwEugW7DR/FlP5@cute>
Date: Mon, 5 Aug 2024 09:30:26 -0600
From: "Gustavo A. R. Silva" <gustavoars@...nel.org>
To: Dimitris Michailidis <dmichail@...gible.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	linux-hardening@...r.kernel.org
Subject: [PATCH][next] net/fungible: Avoid -Wflex-array-member-not-at-end
 warning

Use the `DEFINE_RAW_FLEX()` helper for an on-stack definition of
a flexible structure where the size of the flexible-array member
is known at compile-time, and refactor the rest of the code,
accordingly.

So, with these changes, fix the following warning:
drivers/net/ethernet/fungible/funcore/fun_dev.c:550:43: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/net/ethernet/fungible/funcore/fun_dev.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/fungible/funcore/fun_dev.c b/drivers/net/ethernet/fungible/funcore/fun_dev.c
index a7fbd4cd560a..ce97b76f9ae0 100644
--- a/drivers/net/ethernet/fungible/funcore/fun_dev.c
+++ b/drivers/net/ethernet/fungible/funcore/fun_dev.c
@@ -546,17 +546,14 @@ int fun_bind(struct fun_dev *fdev, enum fun_admin_bind_type type0,
 	     unsigned int id0, enum fun_admin_bind_type type1,
 	     unsigned int id1)
 {
-	struct {
-		struct fun_admin_bind_req req;
-		struct fun_admin_bind_entry entry[2];
-	} cmd = {
-		.req.common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_BIND,
-							 sizeof(cmd)),
-		.entry[0] = FUN_ADMIN_BIND_ENTRY_INIT(type0, id0),
-		.entry[1] = FUN_ADMIN_BIND_ENTRY_INIT(type1, id1),
-	};
+	DEFINE_RAW_FLEX(struct fun_admin_bind_req, cmd, entry, 2);
+
+	cmd->common = FUN_ADMIN_REQ_COMMON_INIT2(FUN_ADMIN_OP_BIND,
+						 __struct_size(cmd));
+	cmd->entry[0] = FUN_ADMIN_BIND_ENTRY_INIT(type0, id0);
+	cmd->entry[1] = FUN_ADMIN_BIND_ENTRY_INIT(type1, id1);
 
-	return fun_submit_admin_sync_cmd(fdev, &cmd.req.common, NULL, 0, 0);
+	return fun_submit_admin_sync_cmd(fdev, &cmd->common, NULL, 0, 0);
 }
 EXPORT_SYMBOL_GPL(fun_bind);
 
-- 
2.34.1