linux-next: build warning after merge of the tty tree

[Stephen Rothwell]

Hi Greg,

After merging the tty tree, today's linux-next build (x86_64 allmodconfig)
produced this warning:

drivers/tty/serial/kgdboc.c:134:12: warning: 'kgdboc_option_setup' defined but not used [-Wunused-function]
 static int kgdboc_option_setup(char *opt)
            ^~~~~~~~~~~~~~~~~~~

Introduced by commit

  2dd453168643 ("kgdboc: Fix restrict error")

-- 
Cheers,
Stephen Rothwell

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