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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:53:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:40 -0700
commit04f378b198da233ca0aca341b113dc6579d46123 (patch)
tree696e7bd401125cee71ecaa2047c4273f38732554 /fs/compat_ioctl.c
parente52384426064bca0669a954736206adca7595d48 (diff)
downloadop-kernel-dev-04f378b198da233ca0aca341b113dc6579d46123.zip
op-kernel-dev-04f378b198da233ca0aca341b113dc6579d46123.tar.gz
tty: BKL pushdown
- Push the BKL down into the line disciplines - Switch the tty layer to unlocked_ioctl - Introduce a new ctrl_lock spin lock for the control bits - Eliminate much of the lock_kernel use in n_tty - Prepare to (but don't yet) call the drivers with the lock dropped on the paths that historically held the lock BKL now primarily protects open/close/ldisc change in the tty layer [jirislaby@gmail.com: a couple of fixes] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/compat_ioctl.c')
-rw-r--r--fs/compat_ioctl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index c6e72ae..9663e87 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1046,7 +1046,7 @@ static int vt_check(struct file *file)
struct inode *inode = file->f_path.dentry->d_inode;
struct vc_data *vc;
- if (file->f_op->ioctl != tty_ioctl)
+ if (file->f_op->unlocked_ioctl != tty_ioctl)
return -EINVAL;
tty = (struct tty_struct *)file->private_data;
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