Re: linux-next: build warning after merge of the device-mapper tree

[yangerkun]

å 2020/7/9 11:26, Stephen Rothwell åé:
> Hi all,
>
> After merging the device-mapper tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
>
> In file included from drivers/md/dm-dust.c:11:
> drivers/md/dm-dust.c: In function 'dust_list_badblocks':
> drivers/md/dm-dust.c:307:10: warning: zero-length gnu_printf format string [-Wformat-zero-length]
>    307 |   DMEMIT("");
Mike and Bryan,

Should we just use "DMEMIT("\n")"? Maybe it's bad since this lead a
blank line...


>        |          ^~
> include/linux/device-mapper.h:555:46: note: in definition of macro 'DMEMIT'
>    555 |      0 : scnprintf(result + sz, maxlen - sz, x))
>        |                                              ^
>
> Introduced by commit
>
>    20f93ea74f9c ("dm dust: add interface to list all badblocks")