[PATCH v2] ipc:msg: replace one-element array with flexible-array member

[PATCH v2] ipc:msg: replace one-element array with flexible-array member

[Atul Raut]

One-element arrays are obsolete, and flexible
array members have taken their place. So, in
struct compat_msgbuf, replace the one-element
array with a flexible-array member.

This fixes warnings such as:
./ipc/msg.c:981:6-11: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

Signed-off-by: Atul Raut <rauji.raut@gmail.com>
---
 ipc/msg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipc/msg.c b/ipc/msg.c
index fd08b3cb36d7..ee6af4fe52bf 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -978,7 +978,7 @@ SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,
 
 struct compat_msgbuf {
 	compat_long_t mtype;
-	char mtext[1];
+	char mtext[];
 };
 
 long compat_ksys_msgsnd(int msqid, compat_uptr_t msgp,
-- 
2.34.1

Re: [PATCH v2] ipc:msg: replace one-element array with flexible-array member

[Greg KH]

On Thu, Aug 03, 2023 at 09:19:49PM -0700, Atul Raut wrote:
> One-element arrays are obsolete, and flexible
> array members have taken their place. So, in
> struct compat_msgbuf, replace the one-element
> array with a flexible-array member.
> 
> This fixes warnings such as:
> ./ipc/msg.c:981:6-11: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> 
> Signed-off-by: Atul Raut <rauji.raut@gmail.com>
> ---
>  ipc/msg.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/ipc/msg.c b/ipc/msg.c
> index fd08b3cb36d7..ee6af4fe52bf 100644
> --- a/ipc/msg.c
> +++ b/ipc/msg.c
> @@ -978,7 +978,7 @@ SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,
>  
>  struct compat_msgbuf {
>  	compat_long_t mtype;
> -	char mtext[1];
> +	char mtext[];
>  };
>  
>  long compat_ksys_msgsnd(int msqid, compat_uptr_t msgp,
> -- 
> 2.34.1
> 
> _______________________________________________
> Linux-kernel-mentees mailing list
> Linux-kernel-mentees@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees

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