Not really harmful not to, but also not harm in grabbing the lock. And
this shuts up a new WARNING I introduced in commit ddde3c18b700 ("vt:
More locking checks").

Reported-by: Jens Remus <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: Martin Hostettler <[email protected]>
Cc: Adam Borowski <[email protected]>
Cc: Mikulas Patocka <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Sam Ravnborg <[email protected]>
---
 drivers/tty/vt/vt.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ec92f36ab5c4..34aa39d1aed9 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3771,7 +3771,11 @@ static ssize_t show_bind(struct device *dev, struct 
device_attribute *attr,
                         char *buf)
 {
        struct con_driver *con = dev_get_drvdata(dev);
-       int bind = con_is_bound(con->con);
+       int bind;
+
+       console_lock();
+       bind = con_is_bound(con->con);
+       console_unlock();
 
        return snprintf(buf, PAGE_SIZE, "%i\n", bind);
 }
-- 
2.20.1

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