linux-kernel - Re: [PATCH] xen/xenbus: fix W=1 build warning in xenbus_va_dev

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Message-ID: <0f535bed-f4d4-4565-8f21-b10070f793e8@suse.com>
Date: Thu, 19 Jun 2025 14:01:41 +0200
From: Jürgen Groß <jgross@...e.com>
To: jiang.peng9@....com.cn
Cc: sstabellini@...nel.org, oleksandr_tyshchenko@...m.com,
 xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
 xu.xin16@....com.cn, yang.yang29@....com.cn
Subject: Re: [PATCH] xen/xenbus: fix W=1 build warning in xenbus_va_dev_error
 function

On 18.06.25 04:01, jiang.peng9@....com.cn wrote:
> From: Peng Jiang <jiang.peng9@....com.cn>
> 
> 
> This patch fixes a W=1 format-string warning reported by GCC 12.3.0
> 
> by annotating xenbus_switch_fatal() and xenbus_va_dev_error()
> 
> with the __printf attribute. The attribute enables compile-time
> 
> validation of printf-style format strings in these functions.
> 
> 
> The original warning trace:
> 
> drivers/xen/xenbus/xenbus_client.c:304:9: warning: function 
> 'xenbus_va_dev_error' might be
> 
> a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
> 
> 
> Signed-off-by: Peng Jiang <jiang.peng9@....com.cn>

I'm fine with the changes as such, but please send the patch as a
plain text email (no HTML). Otherwise I'm not able to apply it.

You should look into Documentation/process/email-clients.rst in the
kernel source tree.


Juergen

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