summaryrefslogtreecommitdiff
path: root/drivers/tty/Makefile
diff options
context:
space:
mode:
authorVincent Whitchurch <vincent.whitchurch@axis.com>2019-04-03 13:33:27 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-16 15:21:34 +0200
commit3117ff13f104e98b05b61e19cc754d1377e92e15 (patch)
tree466a0a4bb36d0786128d170bcb43f60e40c2c918 /drivers/tty/Makefile
parent89bb1e1ee529d9d06ca694ba22a35dc2a3d6ac67 (diff)
tty: Add NULL TTY driver
If no console driver is enabled (or if a non-present driver is selected with something like console=null in an attempt to disable the console), opening /dev/console errors out, and init scripts and other userspace code that relies on the existence of a console will fail. Symlinking /dev/null to /dev/console does not solve the problem since /dev/null does not behave like a real TTY. To just provide a dummy console to userspace when no console driver is available or desired, add a ttynull driver which simply discards all writes. It can be chosen on the command line in the standard way, i.e. with console=ttynull. Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/Makefile')
-rw-r--r--drivers/tty/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile
index c72cafdf32b4..020b1cd9294f 100644
--- a/drivers/tty/Makefile
+++ b/drivers/tty/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_ISI) += isicom.o
obj-$(CONFIG_MOXA_INTELLIO) += moxa.o
obj-$(CONFIG_MOXA_SMARTIO) += mxser.o
obj-$(CONFIG_NOZOMI) += nozomi.o
+obj-$(CONFIG_NULL_TTY) += ttynull.o
obj-$(CONFIG_ROCKETPORT) += rocket.o
obj-$(CONFIG_SYNCLINK_GT) += synclink_gt.o
obj-$(CONFIG_SYNCLINKMP) += synclinkmp.o