[PATCH] char: lack of bool string made CONFIG_DEVPORT always on

From: Max
Date: Tue Dec 13 2016 - 19:33:00 EST

From: Max Bires <jbires@xxxxxxxxxx>

Without a bool string present, using "# CONFIG_DEVPORT is not set" in
defconfig files would not actually unset devport. This ensured 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>
drivers/char/Kconfig | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 7ad3127..d647e7e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -589,10 +589,13 @@ config TELCLOCK
controlling the behavior of this hardware.

config DEVPORT
- bool
+ bool "/dev/port character device"
depends on !M68K
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.

config DCC_TTY
tristate "DCC tty driver"