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[ Upstream commitd142585bce] If CONFIG_CONSOLE_POLL=y, and CONFIG_SERIAL_CPM=m (hence CONFIG_SERIAL_CPM_CONSOLE=n): drivers/tty/serial/cpm_uart/cpm_uart_core.c:1109:12: warning: ‘udbg_cpm_getc’ defined but not used [-Wunused-function] 1109 | static int udbg_cpm_getc(void) | ^~~~~~~~~~~~~ drivers/tty/serial/cpm_uart/cpm_uart_core.c:1095:13: warning: ‘udbg_cpm_putc’ defined but not used [-Wunused-function] 1095 | static void udbg_cpm_putc(char c) | ^~~~~~~~~~~~~ Fix this by making the udbg definitions depend on CONFIG_SERIAL_CPM_CONSOLE, in addition to CONFIG_CONSOLE_POLL. Fixes:a60526097f("tty: serial: cpm_uart: Add udbg support for enabling xmon") Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/r/20211027075326.3270785-1-geert@linux-m68k.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>