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SubjectRe: linux-next: build warning after merge of the device-mapper tree
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在 2020/7/9 11:26, Stephen Rothwell 写道:
> 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")
>

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