[OCFS2] Make ip_io_sem a mutex

ip_io_sem is now ip_io_mutex.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/buffer_head_io.c

@@ -58,7 +58,7 @@ int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh,
 		goto out;
 	}
 
-	down(&OCFS2_I(inode)->ip_io_sem);
+	mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
 
 	lock_buffer(bh);
 	set_buffer_uptodate(bh);
@@ -82,7 +82,7 @@ int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh,
 		brelse(bh);
 	}
 
-	up(&OCFS2_I(inode)->ip_io_sem);
+	mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
 out:
 	mlog_exit(ret);
 	return ret;
@@ -125,13 +125,13 @@ int ocfs2_read_blocks(struct ocfs2_super *osb, u64 block, int nr,
 		flags &= ~OCFS2_BH_CACHED;
 
 	if (inode)
-		down(&OCFS2_I(inode)->ip_io_sem);
+		mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
 	for (i = 0 ; i < nr ; i++) {
 		if (bhs[i] == NULL) {
 			bhs[i] = sb_getblk(sb, block++);
 			if (bhs[i] == NULL) {
 				if (inode)
-					up(&OCFS2_I(inode)->ip_io_sem);
+					mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
 				status = -EIO;
 				mlog_errno(status);
 				goto bail;
@@ -220,7 +220,7 @@ int ocfs2_read_blocks(struct ocfs2_super *osb, u64 block, int nr,
 			ocfs2_set_buffer_uptodate(inode, bh);
 	}
 	if (inode)
-		up(&OCFS2_I(inode)->ip_io_sem);
+		mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
 
 	mlog(ML_BH_IO, "block=(%"MLFu64"), nr=(%d), cached=%s\n", block, nr,
 	     (!(flags & OCFS2_BH_CACHED) || ignore_cache) ? "no" : "yes");

fs/ocfs2/inode.c

@@ -903,10 +903,10 @@ void ocfs2_clear_inode(struct inode *inode)
 			"Clear inode of %"MLFu64", inode is locked\n",
 			oi->ip_blkno);
 
-	mlog_bug_on_msg(down_trylock(&oi->ip_io_sem),
-			"Clear inode of %"MLFu64", io_sem is locked\n",
+	mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
+			"Clear inode of %"MLFu64", io_mutex is locked\n",
 			oi->ip_blkno);
-	up(&oi->ip_io_sem);
+	mutex_unlock(&oi->ip_io_mutex);
 
 	/*
 	 * down_trylock() returns 0, down_write_trylock() returns 1

fs/ocfs2/inode.h

@@ -46,10 +46,10 @@ struct ocfs2_inode_info
 	struct list_head		ip_io_markers;
 	int				ip_orphaned_slot;
 
-	struct semaphore		ip_io_sem;
+	struct mutex			ip_io_mutex;
 
 	/* Used by the journalling code to attach an inode to a
-	 * handle.  These are protected by ip_io_sem in order to lock
+	 * handle.  These are protected by ip_io_mutex in order to lock
 	 * out other I/O to the inode until we either commit or
 	 * abort. */
 	struct list_head		ip_handle_list;

fs/ocfs2/journal.c

@@ -401,7 +401,7 @@ int ocfs2_journal_access(struct ocfs2_journal_handle *handle,
 	 * j_trans_barrier for us. */
 	ocfs2_set_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode);
 
-	down(&OCFS2_I(inode)->ip_io_sem);
+	mutex_lock(&OCFS2_I(inode)->ip_io_mutex);
 	switch (type) {
 	case OCFS2_JOURNAL_ACCESS_CREATE:
 	case OCFS2_JOURNAL_ACCESS_WRITE:
@@ -416,7 +416,7 @@ int ocfs2_journal_access(struct ocfs2_journal_handle *handle,
 		status = -EINVAL;
 		mlog(ML_ERROR, "Uknown access type!\n");
 	}
-	up(&OCFS2_I(inode)->ip_io_sem);
+	mutex_unlock(&OCFS2_I(inode)->ip_io_mutex);
 
 	if (status < 0)
 		mlog(ML_ERROR, "Error %d getting %d access to buffer!\n",

fs/ocfs2/super.c

@@ -932,7 +932,7 @@ static void ocfs2_inode_init_once(void *data,
 		oi->ip_dir_start_lookup = 0;
 
 		init_rwsem(&oi->ip_alloc_sem);
-		init_MUTEX(&(oi->ip_io_sem));
+		mutex_init(&oi->ip_io_mutex);
 
 		oi->ip_blkno = 0ULL;
 		oi->ip_clusters = 0;

fs/ocfs2/uptodate.c

@@ -388,7 +388,7 @@ out_free:
 	}
 }
 
-/* Item insertion is guarded by ip_io_sem, so the insertion path takes
+/* Item insertion is guarded by ip_io_mutex, so the insertion path takes
  * advantage of this by not rechecking for a duplicate insert during
  * the slow case. Additionally, if the cache needs to be bumped up to
  * a tree, the code will not recheck after acquiring the lock --
@@ -418,7 +418,7 @@ void ocfs2_set_buffer_uptodate(struct inode *inode,
 	     (unsigned long long) bh->b_blocknr);
 
 	/* No need to recheck under spinlock - insertion is guarded by
-	 * ip_io_sem */
+	 * ip_io_mutex */
 	spin_lock(&oi->ip_lock);
 	if (ocfs2_insert_can_use_array(oi, ci)) {
 		/* Fast case - it's an array and there's a free
@@ -440,7 +440,7 @@ void ocfs2_set_buffer_uptodate(struct inode *inode,
 
 /* Called against a newly allocated buffer. Most likely nobody should
  * be able to read this sort of metadata while it's still being
- * allocated, but this is careful to take ip_io_sem anyway. */
+ * allocated, but this is careful to take ip_io_mutex anyway. */
 void ocfs2_set_new_buffer_uptodate(struct inode *inode,
 				   struct buffer_head *bh)
 {
@@ -451,9 +451,9 @@ void ocfs2_set_new_buffer_uptodate(struct inode *inode,
 
 	set_buffer_uptodate(bh);
 
-	down(&oi->ip_io_sem);
+	mutex_lock(&oi->ip_io_mutex);
 	ocfs2_set_buffer_uptodate(inode, bh);
-	up(&oi->ip_io_sem);
+	mutex_unlock(&oi->ip_io_mutex);
 }
 
 /* Requires ip_lock. */