Subject: Re: linux-next: build warning after merge of the char-misc.current tree

From: Greg KH <[email-masked]>
Date: Wed, 9 Sep 2020 14:22:25 +0200

On Tue, Sep 08, 2020 at 09:43:17AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the char-misc.current tree, today's linux-next build
> (x86_64 allmodconfig) produced this warning:
> 
> In file included from include/linux/printk.h:7,
>                  from include/linux/kernel.h:15,
>                  from lib/dynamic_debug.c:16:
> lib/dynamic_debug.c: In function 'ddebug_parse_query':
> include/linux/kern_levels.h:5:18: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
>     5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
>       |                  ^~~~~~
> include/linux/kern_levels.h:14:19: note: in expansion of macro 'KERN_SOH'
>    14 | #define KERN_INFO KERN_SOH "6" /* informational */
>       |                   ^~~~~~~~
> include/linux/printk.h:369:9: note: in expansion of macro 'KERN_INFO'
>   369 |  printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
>       |         ^~~~~~~~~
> lib/dynamic_debug.c:116:3: note: in expansion of macro 'pr_info'
>   116 |   pr_info(fmt, ##__VA_ARGS__);   \
>       |   ^~~~~~~
> lib/dynamic_debug.c:119:28: note: in expansion of macro 'vnpr_info'
>   119 | #define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__)
>       |                            ^~~~~~~~~
> lib/dynamic_debug.c:388:3: note: in expansion of macro 'vpr_info'
>   388 |   vpr_info("module:%s queries:'%s'\n", modname);
>       |   ^~~~~~~~
> 
> Introduced by commit
> 
>   42f07816ac0c ("dyndbg: fix problem parsing format="foo bar"")

Odd it doesn't show up in my builds, or in 0-day :(

Jim, can you send a fix for this, or is this due to some other tree's
issues?

thanks,

greg k-h