Delay creation of khcvd thread

This changes hvc_init() to be called only when someone actually uses the
hvc_console driver.  Dave Jones complained when profiling bootup.

hvc_console used to only be for Power aka pSeries: now lguest and Xen both
want it built-in in case the kernel is a guest under one of those, even
though usually it will be a native boot.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 1232ace097e1..57b801716fbe 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -585,8 +585,8 @@ config TIPAR
 config HVC_DRIVER
         bool
         help
-          Users of pSeries machines that want to utilize the hvc console front-end
-          module for their backend console driver should select this option.
+          Generic "hypervisor virtual console" infrastructure for various
+          hypervisors (pSeries, Xen, lguest).
           It will automatically be selected if one of the back-end console drivers
           is selected.