[PATCH] md: Export bio_split_pool for md to use.

fs/bio.c

@@ -38,7 +38,7 @@ static kmem_cache_t *bio_slab;
  * basically we just need to survive
  */
 #define BIO_SPLIT_ENTRIES 8	
-static mempool_t *bio_split_pool;
+mempool_t *bio_split_pool;
 
 struct biovec_pool {
 	int nr_vecs;
@@ -916,3 +916,4 @@ EXPORT_SYMBOL(bio_map_user);
 EXPORT_SYMBOL(bio_unmap_user);
 EXPORT_SYMBOL(bio_pair_release);
 EXPORT_SYMBOL(bio_split);
+EXPORT_SYMBOL(bio_split_pool);

include/linux/bio.h

@@ -222,6 +222,7 @@ struct bio_pair {
 };
 extern struct bio_pair *bio_split(struct bio *bi, mempool_t *pool,
 				  int first_sectors);
+extern mempool_t *bio_split_pool;
 extern void bio_pair_release(struct bio_pair *dbio);
 
 extern struct bio *bio_alloc(int, int);