| commit | cbe9352fa08f90aa03b4dbf1bbabfc95d196e562 | [log] [tgz] |
|---|---|---|
| author | Linus Torvalds <torvalds@linux-foundation.org> | Mon Aug 03 14:54:56 2009 -0700 |
| committer | Greg Kroah-Hartman <gregkh@suse.de> | Tue Aug 04 13:46:30 2009 -0700 |
| tree | 960187b610e13e5ef7f461397bd0846a36221436 | |
| parent | 65b770468e98941e45e19780dff9283e663e6b8b [diff] |
tty-ldisc: be more careful in 'put_ldisc' locking Use 'atomic_dec_and_lock()' to make sure that we always hold the tty_ldisc_lock when the ldisc count goes to zero. That way we can never race against 'tty_ldisc_try()' increasing the count again. Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Tested-by: Sergey Senozhatsky <sergey.senozhatsky@mail.by> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>