tree bdcfedb358238fa0775b933f7a2393eb3c552a36
parent 532774ec7fa396da20ca724c0cf83d93ee76622f
author Hendrik Brueckner <brueckner@linux.vnet.ibm.com> 1229386178 +0000
committer Paul Mackerras <paulus@samba.org> 1229829675 +1100

hvc_console: Escape magic sysrq key

The ctrl-o (^O) is a common control key used by several applications,
such as vim, but hvc_console uses ^O as the magic-sysrq key.  This
commit allows users to send ^O to applications by pressing ^O twice
in succession.

To implement this, this commit introduces a check if ^O is pressed
again if the sysrq_pressed variable is already set.  In this case,
clear sysrq_pressed state and flip the ^O character to the tty.  (The
old behavior has always set "sysrq_pressed" if ^O has been entered,
and it has not flipped the ^O character to the tty.)

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>