unregister_chrdev() return void
unregister_chrdev() does not return meaningful value. This patch makes it return void like most unregister_* functions. Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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