diff options
| author | Vincent Whitchurch <vincent.whitchurch@axis.com> | 2019-04-03 13:33:27 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-16 15:21:34 +0200 |
| commit | 3117ff13f104e98b05b61e19cc754d1377e92e15 (patch) | |
| tree | 466a0a4bb36d0786128d170bcb43f60e40c2c918 /drivers/tty/Makefile | |
| parent | 89bb1e1ee529d9d06ca694ba22a35dc2a3d6ac67 (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/Makefile | 1 |
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 |