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authorMax Bires <jbires@google.com>2017-01-03 08:18:07 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-11 08:28:52 +0100
commitf2cfa58b136e4b06a9b9db7af5ef62fbb5992f62 (patch)
tree3171a9aeba6f13534abe554ce73d6686e8321304
parent874bcd00f520cac297aefade201c4efc07fc8d17 (diff)
char: lack of bool string made CONFIG_DEVPORT always on
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>
-rw-r--r--drivers/char/Kconfig5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index fde005ef9d36..4ee2a10207d0 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -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"