Btrfs: many allocator fixes, pretty solid

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/bit-radix.h b/fs/btrfs/bit-radix.h
index 56aad4c..4e717e3 100644
--- a/fs/btrfs/bit-radix.h
+++ b/fs/btrfs/bit-radix.h
@@ -6,7 +6,7 @@
 int test_radix_bit(struct radix_tree_root *radix, unsigned long bit);
 int clear_radix_bit(struct radix_tree_root *radix, unsigned long bit);
 int find_first_radix_bit(struct radix_tree_root *radix, unsigned long *retbits,
-			 int nr);
+			 unsigned long start, int nr);
 
 static inline void init_bit_radix(struct radix_tree_root *radix)
 {