diff options
| author | Nick Piggin <npiggin@kernel.dk> | 2010-08-18 04:37:35 +1000 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-08-18 08:35:47 -0400 |
| commit | ee2ffa0dfdd2db19705f2ba1c6a4c0bfe8122dd8 (patch) | |
| tree | e48400d1a33f8d2e68589ccfd61637aa64462f08 /drivers/char/pty.c | |
| parent | b04f784e5d19ed58892833dae845738972cea260 (diff) | |
| download | lwn-ee2ffa0dfdd2db19705f2ba1c6a4c0bfe8122dd8.tar.gz lwn-ee2ffa0dfdd2db19705f2ba1c6a4c0bfe8122dd8.zip | |
fs: cleanup files_lock locking
fs: cleanup files_lock locking
Lock tty_files with a new spinlock, tty_files_lock; provide helpers to
manipulate the per-sb files list; unexport the files_lock spinlock.
Cc: linux-kernel@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'drivers/char/pty.c')
| -rw-r--r-- | drivers/char/pty.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c index ad46eae1f9bb..2c64faa8efa4 100644 --- a/drivers/char/pty.c +++ b/drivers/char/pty.c @@ -676,7 +676,11 @@ static int ptmx_open(struct inode *inode, struct file *filp) set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */ filp->private_data = tty; - file_move(filp, &tty->tty_files); + + file_sb_list_del(filp); /* __dentry_open has put it on the sb list */ + spin_lock(&tty_files_lock); + list_add(&filp->f_u.fu_list, &tty->tty_files); + spin_unlock(&tty_files_lock); retval = devpts_pty_new(inode, tty->link); if (retval) |