jfs_truncate needs to call block_truncate_page.

Moved the function from file.c to inode.c since block_truncate_page uses
jfs_get_block which is static.

fs/jfs/file.c

@@ -27,6 +27,7 @@
 
 
 extern int jfs_commit_inode(struct inode *, int);
+extern void jfs_truncate(struct inode *);
 
 int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 {
@@ -43,59 +44,6 @@ int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 	return rc ? -EIO : 0;
 }
 
-/*
- * Guts of jfs_truncate.  Called with locks already held.  Can be called
- * with directory for truncating directory index table.
- */
-void jfs_truncate_nolock(struct inode *ip, loff_t length)
-{
-	loff_t newsize;
-	tid_t tid;
-
-	ASSERT(length >= 0);
-
-	if (test_cflag(COMMIT_Nolink, ip)) {
-		xtTruncate(0, ip, length, COMMIT_WMAP);
-		return;
-	}
-
-	do {
-		tid = txBegin(ip->i_sb, 0);
-
-		/*
-		 * The commit_sem cannot be taken before txBegin.
-		 * txBegin may block and there is a chance the inode
-		 * could be marked dirty and need to be committed
-		 * before txBegin unblocks
-		 */
-		down(&JFS_IP(ip)->commit_sem);
-
-		newsize = xtTruncate(tid, ip, length,
-				     COMMIT_TRUNCATE | COMMIT_PWMAP);
-		if (newsize < 0) {
-			txEnd(tid);
-			up(&JFS_IP(ip)->commit_sem);
-			break;
-		}
-
-		ip->i_mtime = ip->i_ctime = CURRENT_TIME;
-		mark_inode_dirty(ip);
-
-		txCommit(tid, 1, &ip, 0);
-		txEnd(tid);
-		up(&JFS_IP(ip)->commit_sem);
-	} while (newsize > length);	/* Truncate isn't always atomic */
-}
-
-static void jfs_truncate(struct inode *ip)
-{
-	jFYI(1, ("jfs_truncate: size = 0x%lx\n", (ulong) ip->i_size));
-
-	IWRITE_LOCK(ip);
-	jfs_truncate_nolock(ip, ip->i_size);
-	IWRITE_UNLOCK(ip);
-}
-
 static int jfs_open(struct inode *inode, struct file *file)
 {
 	int rc;

fs/jfs/inode.c

@@ -330,3 +330,58 @@ struct address_space_operations jfs_aops = {
 	.bmap		= jfs_bmap,
 	.direct_IO	= jfs_direct_IO,
 };
+
+/*
+ * Guts of jfs_truncate.  Called with locks already held.  Can be called
+ * with directory for truncating directory index table.
+ */
+void jfs_truncate_nolock(struct inode *ip, loff_t length)
+{
+	loff_t newsize;
+	tid_t tid;
+
+	ASSERT(length >= 0);
+
+	if (test_cflag(COMMIT_Nolink, ip)) {
+		xtTruncate(0, ip, length, COMMIT_WMAP);
+		return;
+	}
+
+	do {
+		tid = txBegin(ip->i_sb, 0);
+
+		/*
+		 * The commit_sem cannot be taken before txBegin.
+		 * txBegin may block and there is a chance the inode
+		 * could be marked dirty and need to be committed
+		 * before txBegin unblocks
+		 */
+		down(&JFS_IP(ip)->commit_sem);
+
+		newsize = xtTruncate(tid, ip, length,
+				     COMMIT_TRUNCATE | COMMIT_PWMAP);
+		if (newsize < 0) {
+			txEnd(tid);
+			up(&JFS_IP(ip)->commit_sem);
+			break;
+		}
+
+		ip->i_mtime = ip->i_ctime = CURRENT_TIME;
+		mark_inode_dirty(ip);
+
+		txCommit(tid, 1, &ip, 0);
+		txEnd(tid);
+		up(&JFS_IP(ip)->commit_sem);
+	} while (newsize > length);	/* Truncate isn't always atomic */
+}
+
+void jfs_truncate(struct inode *ip)
+{
+	jFYI(1, ("jfs_truncate: size = 0x%lx\n", (ulong) ip->i_size));
+
+	block_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
+
+	IWRITE_LOCK(ip);
+	jfs_truncate_nolock(ip, ip->i_size);
+	IWRITE_UNLOCK(ip);
+}