Fix up -Wmissing-prototypes in compileable userspace code, mainly under
Documentation/.
Signed-off-by: NLadinu Chandrasinghe <ladinu.pub@gmail.com>
Signed-off-by: NTrevor Keith <tsrk@tsrk.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>