This is a note to let you know that I've just added the patch titled
char: lack of bool string made CONFIG_DEVPORT always on
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
char-lack-of-bool-string-made-config_devport-always-on.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f2cfa58b136e4b06a9b9db7af5ef62fbb5992f62 Mon Sep 17 00:00:00 2001
From: Max Bires <jbires@xxxxxxxxxx>
Date: Tue, 3 Jan 2017 08:18:07 -0800
Subject: char: lack of bool string made CONFIG_DEVPORT always on
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/Kconfig | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -583,9 +583,12 @@ 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"
Patches currently in stable-queue which might be from jbires@xxxxxxxxxx are
queue-4.4/char-lack-of-bool-string-made-config_devport-always-on.patch