From 1d5599e397dcc7c2300d200e66dad326d7dbac38 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 23 Mar 2006 03:00:41 -0800
Subject: [PATCH] [PATCH] sem2mutex: autofs4 wq_sem

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>
Acked-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 fs/autofs4/autofs_i.h |  3 ++-
 fs/autofs4/inode.c    |  2 +-
 fs/autofs4/waitq.c    | 16 ++++++++--------
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h
index 385bed09b0d8..f54c5b21f876 100644
--- a/fs/autofs4/autofs_i.h
+++ b/fs/autofs4/autofs_i.h
@@ -13,6 +13,7 @@
 /* Internal header file for autofs */
 
 #include <linux/auto_fs4.h>
+#include <linux/mutex.h>
 #include <linux/list.h>
 
 /* This is the range of ioctl() numbers we claim as ours */
@@ -102,7 +103,7 @@ struct autofs_sb_info {
 	int reghost_enabled;
 	int needs_reghost;
 	struct super_block *sb;
-	struct semaphore wq_sem;
+	struct mutex wq_mutex;
 	spinlock_t fs_lock;
 	struct autofs_wait_queue *queues; /* Wait queue pointer */
 };
diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index 2d3082854a29..1ad98d48e550 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -269,7 +269,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 	sbi->sb = s;
 	sbi->version = 0;
 	sbi->sub_version = 0;
-	init_MUTEX(&sbi->wq_sem);
+	mutex_init(&sbi->wq_mutex);
 	spin_lock_init(&sbi->fs_lock);
 	sbi->queues = NULL;
 	s->s_blocksize = 1024;
diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c
index 394ff36ef8f1..be78e9378c03 100644
--- a/fs/autofs4/waitq.c
+++ b/fs/autofs4/waitq.c
@@ -178,7 +178,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		return -ENOENT;
 	}
 
-	if (down_interruptible(&sbi->wq_sem)) {
+	if (mutex_lock_interruptible(&sbi->wq_mutex)) {
 		kfree(name);
 		return -EINTR;
 	}
@@ -194,7 +194,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		/* Can't wait for an expire if there's no mount */
 		if (notify == NFY_NONE && !d_mountpoint(dentry)) {
 			kfree(name);
-			up(&sbi->wq_sem);
+			mutex_unlock(&sbi->wq_mutex);
 			return -ENOENT;
 		}
 
@@ -202,7 +202,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL);
 		if ( !wq ) {
 			kfree(name);
-			up(&sbi->wq_sem);
+			mutex_unlock(&sbi->wq_mutex);
 			return -ENOMEM;
 		}
 
@@ -218,10 +218,10 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		wq->status = -EINTR; /* Status return if interrupted */
 		atomic_set(&wq->wait_ctr, 2);
 		atomic_set(&wq->notified, 1);
-		up(&sbi->wq_sem);
+		mutex_unlock(&sbi->wq_mutex);
 	} else {
 		atomic_inc(&wq->wait_ctr);
-		up(&sbi->wq_sem);
+		mutex_unlock(&sbi->wq_mutex);
 		kfree(name);
 		DPRINTK("existing wait id = 0x%08lx, name = %.*s, nfy=%d",
 			(unsigned long) wq->wait_queue_token, wq->len, wq->name, notify);
@@ -282,19 +282,19 @@ int autofs4_wait_release(struct autofs_sb_info *sbi, autofs_wqt_t wait_queue_tok
 {
 	struct autofs_wait_queue *wq, **wql;
 
-	down(&sbi->wq_sem);
+	mutex_lock(&sbi->wq_mutex);
 	for ( wql = &sbi->queues ; (wq = *wql) != 0 ; wql = &wq->next ) {
 		if ( wq->wait_queue_token == wait_queue_token )
 			break;
 	}
 
 	if ( !wq ) {
-		up(&sbi->wq_sem);
+		mutex_unlock(&sbi->wq_mutex);
 		return -EINVAL;
 	}
 
 	*wql = wq->next;	/* Unlink from chain */
-	up(&sbi->wq_sem);
+	mutex_unlock(&sbi->wq_mutex);
 	kfree(wq->name);
 	wq->name = NULL;	/* Do not wait on this queue */