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SubjectRe: [PATCH 13/36] tty: serial: 8250: 8250_port: Staticify functions referenced by pointers
On Wed, Nov 04, 2020 at 07:35:26PM +0000, Lee Jones wrote:
> Fixes the following W=1 kernel build warning(s):
>
> drivers/tty/serial/8250/8250_port.c:349:14: warning: no previous prototype for ‘au_serial_in’ [-Wmissing-prototypes]
> drivers/tty/serial/8250/8250_port.c:359:6: warning: no previous prototype for ‘au_serial_out’ [-Wmissing-prototypes]
>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jirislaby@kernel.org>
> Cc: Mike Hudson <Exoray@isys.ca>
> Cc: linux-serial@vger.kernel.org
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
> drivers/tty/serial/8250/8250_port.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

And now I get build errors of:
ld: drivers/tty/serial/8250/8250_early.o: in function `early_au_setup':
8250_early.c:(.init.text+0x7): undefined reference to `au_serial_in'
ld: 8250_early.c:(.init.text+0xf): undefined reference to `au_serial_out'
make: *** [Makefile:1164: vmlinux] Error 1

Always test-build your patches, perhaps W=1 was wrong here...

thanks,

greg k-h

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