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-rw-r--r--fs/jfs/jfs_extent.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/jfs/jfs_extent.h b/fs/jfs/jfs_extent.h
new file mode 100644
index 0000000000..a0ee4ccea6
--- /dev/null
+++ b/fs/jfs/jfs_extent.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) International Business Machines Corp., 2000-2001
+ */
+#ifndef _H_JFS_EXTENT
+#define _H_JFS_EXTENT
+
+/* get block allocation hint as location of disk inode */
+#define INOHINT(ip) \
+ (addressPXD(&(JFS_IP(ip)->ixpxd)) + lengthPXD(&(JFS_IP(ip)->ixpxd)) - 1)
+
+extern int extAlloc(struct inode *, s64, s64, xad_t *, bool);
+extern int extHint(struct inode *, s64, xad_t *);
+extern int extRecord(struct inode *, xad_t *);
+
+#endif /* _H_JFS_EXTENT */