[PATCH] vt: add TIOCL_GETKMSGREDIRECT

Add TIOCL_GETKMSGREDIRECT needed by the userland suspend tool to get the
current value of kmsg_redirect from the kernel so that it can save it and
restore it after resume.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@suse.cz>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index ca4844c527da..acc5d47844eb 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -2328,6 +2328,10 @@ int tioclinux(struct tty_struct *tty, unsigned long arg)
                 case TIOCL_SETVESABLANK:
                         set_vesa_blanking(p);
                         break;
+                case TIOCL_GETKMSGREDIRECT:
+                        data = kmsg_redirect;
+                        ret = __put_user(data, p);
+                        break;
                 case TIOCL_SETKMSGREDIRECT:
                         if (!capable(CAP_SYS_ADMIN)) {
                                 ret = -EPERM;