linux-kernel - [PATCH] s390: replace zero-length array with flexible-array member

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Message-Id: <20220401075639.2407457-1-lv.ruyi@zte.com.cn>
Date:   Fri,  1 Apr 2022 07:56:39 +0000
From:   cgel.zte@...il.com
To:     hca@...ux.ibm.com, gor@...ux.ibm.com
Cc:     agordeev@...ux.ibm.com, borntraeger@...ux.ibm.com,
        svens@...ux.ibm.com, lv.ruyi@....com.cn, egorenar@...ux.ibm.com,
        oberpar@...ux.ibm.com, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zeal Robot <zealci@....com.cn>
Subject: [PATCH] s390: replace zero-length array with flexible-array member

From: Lv Ruyi <lv.ruyi@....com.cn>

There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 drivers/s390/char/sclp_cmd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 15971997cfe2..3c87057436d5 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -241,7 +241,7 @@ struct attach_storage_sccb {
 	u16 :16;
 	u16 assigned;
 	u32 :32;
-	u32 entries[0];
+	u32 entries[];
 } __packed;
 
 static int sclp_attach_storage(u8 id)
-- 
2.25.1