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char: lack of bool string made CONFIG_DEVPORT always on

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commit f2cfa58b13 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@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Max Bires
2017-01-03 08:18:07 -08:00
committed by Greg Kroah-Hartman
parent 666452ffdb
commit a9da1ac37c
1 changed files with 4 additions and 1 deletions
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5
drivers/char/Kconfig
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@@ -571,9 +571,12 @@ 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"