earlycon: mark earlycon code as __used iif the caller is built-in

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Keep earlycon related symbols only when CONFIG_SERIAL_EARLYCON is
enabled and the driver is built-in.  This will be helpful to clean
up ifdefs surrounding earlycon code in serial drivers.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Masahiro Yamada 2016-06-06 18:41:00 +09:00 • committed by Greg Kroah-Hartman

parent 4ef03d3287

commit f8ba3647f3

1 changed files with 7 additions and 1 deletions

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include/linux/serial_core.h

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