[PATCH] btree: Export btree_get_prev() so modules can use btree_for_each

[Roland Dreier <roland@kernel.org>]

From: Steve Hodgson <steve@purestorage.com>

The btree_for_each API is implemented with macros that internally call
btree_get_prev(), so if btree_get_prev() isn't exported then modules
fail to link if they try to use one of the btree_for_each macros.  Since
the rest of the btree API is exported, we should keep things orthogonal
and make this work too.

Cc: Joern Engel <joern@logfs.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
---
 lib/btree.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/btree.c b/lib/btree.c
index 2a34392..e5ec1e9 100644
--- a/lib/btree.c
+++ b/lib/btree.c
@@ -357,6 +357,7 @@ miss:
 	}
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(btree_get_prev);
 
 static int getpos(struct btree_geo *geo, unsigned long *node,
 		unsigned long *key)
-- 
1.7.5.4