In a randconfig with CONFIG_SERIAL_CPM=m and
CONFIG_PPC_EARLY_DEBUG_CPM=y, there is a build error:
ERROR: modpost: "udbg_putc" [drivers/tty/serial/cpm_uart/cpm_uart.ko] undefined!
The build can be fixed by exporting "udbg_putc" in udbg.c.
OTOH, maybe something like this is more appropriate in
arch/powerpc/Kconfig.debug?
config PPC_EARLY_DEBUG_CPM
bool "Early serial debugging for Freescale CPM-based serial ports"
- depends on SERIAL_CPM
+ depends on SERIAL_CPM=y
Signed-off-by: Randy Dunlap <rdun...@infradead.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
Cc: Nicholas Piggin <npig...@gmail.com>
Cc: Christophe Leroy <christophe.le...@csgroup.eu>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: Arnd Bergmann <a...@arndb.de>
Cc: "Pali Rohár" <p...@kernel.org>
---
arch/powerpc/kernel/udbg.c | 1 +
1 file changed, 1 insertion(+)
diff -- a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -14,6 +14,7 @@
#include <asm/udbg.h>
void (*udbg_putc)(char c);
+EXPORT_SYMBOL(udbg_putc);
void (*udbg_flush)(void);
int (*udbg_getc)(void);
int (*udbg_getc_poll)(void);
