This macro simplifies declaration of weak aliases for per-driver functions, which register these drivers with the serial subsystem. The idea here is to push serial_register() calls from serial.c into the drivers. To avoid pile of ifdef construct as it is now, create weak aliases to these functions, which in case the driver is not present alias onto an empty function, which is in turn optimized out altogether.
Signed-off-by: Marek Vasut marex@denx.de Cc: Marek Vasut marek.vasut@gmail.com Cc: Tom Rini trini@ti.com Cc: Anatolij Gustschin agust@denx.de Cc: Stefan Roese sr@denx.de Cc: Mike Frysinger vapier@gentoo.org --- common/serial.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/common/serial.c b/common/serial.c index 5740d4f..84dbe50 100644 --- a/common/serial.c +++ b/common/serial.c @@ -32,6 +32,14 @@ DECLARE_GLOBAL_DATA_PTR; static struct serial_device *serial_devices; static struct serial_device *serial_current;
+static void serial_null(void) +{ +} + +#define serial_initfunc(name) \ + void name(void) \ + __attribute__((weak, alias("serial_null"))); + void serial_register(struct serial_device *dev) { #ifdef CONFIG_NEEDS_MANUAL_RELOC