Patch "char: lack of bool string made CONFIG_DEVPORT always on" has been added to the 4.9-stable tree

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 4.9-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-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Max Bires <[email protected]>
Date: Tue, 3 Jan 2017 08:18:07 -0800
Subject: char: lack of bool string made CONFIG_DEVPORT always on

From: Max Bires <[email protected]>

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.

---
 drivers/char/Kconfig |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

@@ -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"
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/char-lack-of-bool-string-made-config_devport-always-on.patch