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-rw-r--r--include/linux/blkdev_compat.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h
index 1ff8eeaf3..9d3e6f07c 100644
--- a/include/linux/blkdev_compat.h
+++ b/include/linux/blkdev_compat.h
@@ -393,6 +393,15 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
#endif /* HAVE_1ARG_INVALIDATE_BDEV */
/*
+ * 2.6.27 API change
+ * The function was exported for use, prior to this it existed by the
+ * symbol was not exported.
+ */
+#ifndef HAVE_LOOKUP_BDEV
+# define lookup_bdev(path) ERR_PTR(-ENOTSUP)
+#endif
+
+/*
* 2.6.30 API change
* To ensure good performance preferentially use the physical block size
* for proper alignment. The physical size is supposed to be the internal