Merge commit 'v2.6.26' into bkl-removal

[net-next-2.6.git] / drivers / char / tty_io.c

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 750131010af01875d06d1c5e11818112c02ecbd2..047a17339f835f1891dbd3db58371a9e25975f91 100644 (file)
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -2665,7 +2665,7 @@ static void release_dev(struct file *filp)
  *              ->siglock protects ->signal/->sighand
  */
 
-static int tty_open(struct inode *inode, struct file *filp)
+static int __tty_open(struct inode *inode, struct file *filp)
 {
        struct tty_struct *tty;
        int noctty, retval;
@@ -2779,6 +2779,19 @@ got_driver:
        return 0;
 }
 
+/* BKL pushdown: scary code avoidance wrapper */
+static int tty_open(struct inode *inode, struct file *filp)
+{
+       int ret;
+
+       lock_kernel();
+       ret = __tty_open(inode, filp);
+       unlock_kernel();
+       return ret;
+}
+
+
+
 #ifdef CONFIG_UNIX98_PTYS
 /**
  *     ptmx_open               -       open a unix 98 pty master
@@ -2792,7 +2805,7 @@ got_driver:
  *             allocated_ptys_lock handles the list of free pty numbers
  */
 
-static int ptmx_open(struct inode *inode, struct file *filp)
+static int __ptmx_open(struct inode *inode, struct file *filp)
 {
        struct tty_struct *tty;
        int retval;
@@ -2831,6 +2844,16 @@ out:
        devpts_kill_index(index);
        return retval;
 }
+
+static int ptmx_open(struct inode *inode, struct file *filp)
+{
+       int ret;
+
+       lock_kernel();
+       ret = __ptmx_open(inode, filp);
+       unlock_kernel();
+       return ret;
+}
 #endif
 
 /**
@@ -2886,15 +2909,16 @@ static int tty_fasync(int fd, struct file *filp, int on)
 {
        struct tty_struct *tty;
        unsigned long flags;
-       int retval;
+       int retval = 0;
 
+       lock_kernel();
        tty = (struct tty_struct *)filp->private_data;
        if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode, "tty_fasync"))
-               return 0;
+               goto out;
 
        retval = fasync_helper(fd, filp, on, &tty->fasync);
        if (retval <= 0)
-               return retval;
+               goto out;
 
        if (on) {
                enum pid_type type;
@@ -2912,12 +2936,15 @@ static int tty_fasync(int fd, struct file *filp, int on)
                spin_unlock_irqrestore(&tty->ctrl_lock, flags);
                retval = __f_setown(filp, pid, type, 0);
                if (retval)
-                       return retval;
+                       goto out;
        } else {
                if (!tty->fasync && !waitqueue_active(&tty->read_wait))
                        tty->minimum_to_wake = N_TTY_BUF_SIZE;
        }
-       return 0;
+       retval = 0;
+out:
+       unlock_kernel();
+       return retval;
 }
 
 /**