tty: Redo current tty locking

Currently it is sometimes locked by the tty mutex and sometimes by the
sighand lock. The latter is in fact correct and now we can hand back referenced
objects we can fix this up without problems around sleeping functions.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/dquot.c b/fs/dquot.c
index 7417a6ca3129..ad7e59003e04 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -895,9 +895,7 @@ static void print_warning(struct dquot *dquot, const int warntype)
             warntype == QUOTA_NL_BSOFTBELOW || !need_print_warning(dquot))
                 return;
 
-        mutex_lock(&tty_mutex);
         tty = get_current_tty();
-        mutex_unlock(&tty_mutex);
         if (!tty)
                 return;
         tty_write_message(tty, dquot->dq_sb->s_id);