Commit f8ba3647 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Greg Kroah-Hartman
Browse files

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



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: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4ef03d32

include/linux/serial_core.h

+7 −1
Original line number Diff line number Diff line
@@ -352,9 +352,15 @@ struct earlycon_id { 
extern const struct earlycon_id __earlycon_table[];

extern const struct earlycon_id __earlycon_table_end[];



#if defined(CONFIG_SERIAL_EARLYCON) && !defined(MODULE)

#define EARLYCON_USED_OR_UNUSED	__used

#else

#define EARLYCON_USED_OR_UNUSED	__maybe_unused

#endif



#define OF_EARLYCON_DECLARE(_name, compat, fn)				\

	static const struct earlycon_id __UNIQUE_ID(__earlycon_##_name)	\

	     __used __section(__earlycon_table)				\

	     EARLYCON_USED_OR_UNUSED __section(__earlycon_table)	\

		= { .name = __stringify(_name),				\

		    .compatible = compat,				\

		    .setup = fn  }

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