[PATCH] sem2mutex: tty

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 25 insertions, 25 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 53d3d06..76592ee 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -130,7 +130,7 @@ LIST_HEAD(tty_drivers);			/* linked list of tty drivers */
 
 /* Semaphore to protect creating and releasing a tty. This is shared with
    vt.c for deeply disgusting hack reasons */
-DECLARE_MUTEX(tty_sem);
+DEFINE_MUTEX(tty_mutex);
 
 #ifdef CONFIG_UNIX98_PTYS
 extern struct tty_driver *ptm_driver;	/* Unix98 pty masters; for /dev/ptmx */
@@ -1188,11 +1188,11 @@ void disassociate_ctty(int on_exit)
 
 	lock_kernel();
 
-	down(&tty_sem);
+	mutex_lock(&tty_mutex);
 	tty = current->signal->tty;
 	if (tty) {
 		tty_pgrp = tty->pgrp;
-		up(&tty_sem);
+		mutex_unlock(&tty_mutex);
 		if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY)
 			tty_vhangup(tty);
 	} else {
@@ -1200,7 +1200,7 @@ void disassociate_ctty(int on_exit)
 			kill_pg(current->signal->tty_old_pgrp, SIGHUP, on_exit);
 			kill_pg(current->signal->tty_old_pgrp, SIGCONT, on_exit);
 		}
-		up(&tty_sem);
+		mutex_unlock(&tty_mutex);
 		unlock_kernel();	
 		return;
 	}
@@ -1211,7 +1211,7 @@ void disassociate_ctty(int on_exit)
 	}
 
 	/* Must lock changes to tty_old_pgrp */
-	down(&tty_sem);
+	mutex_lock(&tty_mutex);
 	current->signal->tty_old_pgrp = 0;
 	tty->session = 0;
 	tty->pgrp = -1;
@@ -1222,7 +1222,7 @@ void disassociate_ctty(int on_exit)
 		p->signal->tty = NULL;
 	} while_each_task_pid(current->signal->session, PIDTYPE_SID, p);
 	read_unlock(&tasklist_lock);
-	up(&tty_sem);
+	mutex_unlock(&tty_mutex);
 	unlock_kernel();
 }
 
@@ -1306,7 +1306,7 @@ static inline ssize_t do_tty_write(
 	ssize_t ret = 0, written = 0;
 	unsigned int chunk;
 	
-	if (down_interruptible(&tty->atomic_write)) {
+	if (mutex_lock_interruptible(&tty->atomic_write_lock)) {
 		return -ERESTARTSYS;
 	}
 
@@ -1329,7 +1329,7 @@ static inline ssize_t do_tty_write(
 	if (count < chunk)
 		chunk = count;
 
-	/* write_buf/write_cnt is protected by the atomic_write semaphore */
+	/* write_buf/write_cnt is protected by the atomic_write_lock mutex */
 	if (tty->write_cnt < chunk) {
 		unsigned char *buf;
 
@@ -1338,7 +1338,7 @@ static inline ssize_t do_tty_write(
 
 		buf = kmalloc(chunk, GFP_KERNEL);
 		if (!buf) {
-			up(&tty->atomic_write);
+			mutex_unlock(&tty->atomic_write_lock);
 			return -ENOMEM;
 		}
 		kfree(tty->write_buf);
@@ -1374,7 +1374,7 @@ static inline ssize_t do_tty_write(
 		inode->i_mtime = current_fs_time(inode->i_sb);
 		ret = written;
 	}
-	up(&tty->atomic_write);
+	mutex_unlock(&tty->atomic_write_lock);
 	return ret;
 }
 
@@ -1442,8 +1442,8 @@ static inline void tty_line_name(struct tty_driver *driver, int index, char *p)
 
 /*
  * WSH 06/09/97: Rewritten to remove races and properly clean up after a
- * failed open.  The new code protects the open with a semaphore, so it's
- * really quite straightforward.  The semaphore locking can probably be
+ * failed open.  The new code protects the open with a mutex, so it's
+ * really quite straightforward.  The mutex locking can probably be
  * relaxed for the (most common) case of reopening a tty.
  */
 static int init_dev(struct tty_driver *driver, int idx,
@@ -1640,7 +1640,7 @@ fast_track:
 success:
 	*ret_tty = tty;
 	
-	/* All paths come through here to release the semaphore */
+	/* All paths come through here to release the mutex */
 end_init:
 	return retval;
 
@@ -1837,7 +1837,7 @@ static void release_dev(struct file * filp)
 		/* Guard against races with tty->count changes elsewhere and
 		   opens on /dev/tty */
 		   
-		down(&tty_sem);
+		mutex_lock(&tty_mutex);
 		tty_closing = tty->count <= 1;
 		o_tty_closing = o_tty &&
 			(o_tty->count <= (pty_master ? 1 : 0));
@@ -1868,7 +1868,7 @@ static void release_dev(struct file * filp)
 
 		printk(KERN_WARNING "release_dev: %s: read/write wait queue "
 				    "active!\n", tty_name(tty, buf));
-		up(&tty_sem);
+		mutex_unlock(&tty_mutex);
 		schedule();
 	}	
 
@@ -1934,7 +1934,7 @@ static void release_dev(struct file * filp)
 		read_unlock(&tasklist_lock);
 	}
 
-	up(&tty_sem);
+	mutex_unlock(&tty_mutex);
 
 	/* check whether both sides are closing ... */
 	if (!tty_closing || (o_tty && !o_tty_closing))
@@ -2040,11 +2040,11 @@ retry_open:
 	index  = -1;
 	retval = 0;
 	
-	down(&tty_sem);
+	mutex_lock(&tty_mutex);
 
 	if (device == MKDEV(TTYAUX_MAJOR,0)) {
 		if (!current->signal->tty) {
-			up(&tty_sem);
+			mutex_unlock(&tty_mutex);
 			return -ENXIO;
 		}
 		driver = current->signal->tty->driver;
@@ -2070,18 +2070,18 @@ retry_open:
 			noctty = 1;
 			goto got_driver;
 		}
-		up(&tty_sem);
+		mutex_unlock(&tty_mutex);
 		return -ENODEV;
 	}
 
 	driver = get_tty_driver(device, &index);
 	if (!driver) {
-		up(&tty_sem);
+		mutex_unlock(&tty_mutex);
 		return -ENODEV;
 	}
 got_driver:
 	retval = init_dev(driver, index, &tty);
-	up(&tty_sem);
+	mutex_unlock(&tty_mutex);
 	if (retval)
 		return retval;
 
@@ -2167,9 +2167,9 @@ static int ptmx_open(struct inode * inode, struct file * filp)
 	}
 	up(&allocated_ptys_lock);
 
-	down(&tty_sem);
+	mutex_lock(&tty_mutex);
 	retval = init_dev(ptm_driver, index, &tty);
-	up(&tty_sem);
+	mutex_unlock(&tty_mutex);
 	
 	if (retval)
 		goto out;
@@ -2915,8 +2915,8 @@ static void initialize_tty_struct(struct tty_struct *tty)
 	init_waitqueue_head(&tty->write_wait);
 	init_waitqueue_head(&tty->read_wait);
 	INIT_WORK(&tty->hangup_work, do_tty_hangup, tty);
-	sema_init(&tty->atomic_read, 1);
-	sema_init(&tty->atomic_write, 1);
+	mutex_init(&tty->atomic_read_lock);
+	mutex_init(&tty->atomic_write_lock);
 	spin_lock_init(&tty->read_lock);
 	INIT_LIST_HEAD(&tty->tty_files);
 	INIT_WORK(&tty->SAK_work, NULL, NULL);