From: Max Bires <jbires@xxxxxxxxxx> commit f2cfa58b136e4b06a9b9db7af5ef62fbb5992f62 upstream. Without a bool string present, using "# CONFIG_DEVPORT is not set" in defconfig files would not actually unset devport. This esnured that /dev/port was always on, but there are reasons a user may wish to disable it (smaller kernel, attack surface reduction) if it's not being used. Adding a message here in order to make this user visible. Signed-off-by: Max Bires <jbires@xxxxxxxxxx> Acked-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Signed-off-by: Willy Tarreau <w@xxxxxx> --- drivers/char/Kconfig | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 3087892..8ccb96a 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -579,9 +579,12 @@ config TELCLOCK controlling the behavior of this hardware. config DEVPORT - bool + bool "/dev/port character device" depends on ISA || PCI default y + help + Say Y here if you want to support the /dev/port device. The /dev/port + device is similar to /dev/mem, but for I/O ports. source "drivers/s390/char/Kconfig" -- 2.8.0.rc2.1.gbe9624a