drivers: char: mem: Make /dev/mem an optional device

Adds Kconfig option CONFIG_DEVMEM that allows the
/dev/mem device to be disabled.

Option defaults to /dev/mem enabled.

Signed-off-by: Rob Ward <robert.ward114@googlemail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index efefd12a0f7b..a4af8221751e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -6,6 +6,15 @@ menu "Character devices"
 
 source "drivers/tty/Kconfig"
 
+config DEVMEM
+        bool "/dev/mem virtual device support"
+        default y
+        help
+          Say Y here if you want to support the /dev/mem device.
+          The /dev/mem device is used to access areas of physical
+          memory.
+          When in doubt, say "Y".
+
 config DEVKMEM
         bool "/dev/kmem virtual device support"
         default y