diff options
| author | Alan Cox <alan@linux.intel.com> | 2009-11-30 13:18:51 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 15:18:08 -0800 |
| commit | 36ba782e9674cdc29ec7003757df0b375e99fa96 (patch) | |
| tree | b434105bf8a04b6b357b5063ce146169ab811bc1 /drivers | |
| parent | 5ec93d1154fd1e269162398f8e70efc7e004485d (diff) | |
| download | linux-36ba782e9674cdc29ec7003757df0b375e99fa96.tar.gz linux-36ba782e9674cdc29ec7003757df0b375e99fa96.tar.bz2 linux-36ba782e9674cdc29ec7003757df0b375e99fa96.zip | |
tty: split the lock up a bit further
The tty count sanity check may need the BKL, that isn't clear. However it
is clear that the count use of the lock is internal and independant of the
bigger use of the lock.
Furthermore the file list locking is also separately locked already
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/tty_io.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index a19fef2093f1..684f0e0b175e 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -516,6 +516,8 @@ static void do_tty_hangup(struct work_struct *work) /* inuse_filps is protected by the single kernel lock */ lock_kernel(); check_tty_count(tty, "do_tty_hangup"); + unlock_kernel(); + file_list_lock(); /* This breaks for file handles being sent over AF_UNIX sockets ? */ list_for_each_entry(filp, &tty->tty_files, f_u.fu_list) { @@ -529,6 +531,7 @@ static void do_tty_hangup(struct work_struct *work) } file_list_unlock(); + lock_kernel(); tty_ldisc_hangup(tty); read_lock(&tasklist_lock); |