block: Drop bioset_create()

All users have been converted to bioset_init(), kill off the
old API.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/bio.c

@@ -1908,22 +1908,26 @@ void bioset_exit(struct bio_set *bs)
 }
 EXPORT_SYMBOL(bioset_exit);
 
-void bioset_free(struct bio_set *bs)
-{
-	bioset_exit(bs);
-	kfree(bs);
-}
-EXPORT_SYMBOL(bioset_free);
-
 /**
  * bioset_init - Initialize a bio_set
+ * @bs:		pool to initialize
  * @pool_size:	Number of bio and bio_vecs to cache in the mempool
  * @front_pad:	Number of bytes to allocate in front of the returned bio
  * @flags:	Flags to modify behavior, currently %BIOSET_NEED_BVECS
  *              and %BIOSET_NEED_RESCUER
  *
- * Similar to bioset_create(), but initializes a passed-in bioset instead of
- * separately allocating it.
+ * Description:
+ *    Set up a bio_set to be used with @bio_alloc_bioset. Allows the caller
+ *    to ask for a number of bytes to be allocated in front of the bio.
+ *    Front pad allocation is useful for embedding the bio inside
+ *    another structure, to avoid allocating extra data to go with the bio.
+ *    Note that the bio must be embedded at the END of that structure always,
+ *    or things will break badly.
+ *    If %BIOSET_NEED_BVECS is set in @flags, a separate pool will be allocated
+ *    for allocating iovecs.  This pool is not needed e.g. for bio_clone_fast().
+ *    If %BIOSET_NEED_RESCUER is set, a workqueue is created which can be used to
+ *    dispatch queued requests when the mempool runs out of space.
+ *
  */
 int bioset_init(struct bio_set *bs,
 		unsigned int pool_size,
@@ -1963,45 +1967,6 @@ int bioset_init(struct bio_set *bs,
 }
 EXPORT_SYMBOL(bioset_init);
 
-/**
- * bioset_create  - Create a bio_set
- * @pool_size:	Number of bio and bio_vecs to cache in the mempool
- * @front_pad:	Number of bytes to allocate in front of the returned bio
- * @flags:	Flags to modify behavior, currently %BIOSET_NEED_BVECS
- *              and %BIOSET_NEED_RESCUER
- *
- * Description:
- *    Set up a bio_set to be used with @bio_alloc_bioset. Allows the caller
- *    to ask for a number of bytes to be allocated in front of the bio.
- *    Front pad allocation is useful for embedding the bio inside
- *    another structure, to avoid allocating extra data to go with the bio.
- *    Note that the bio must be embedded at the END of that structure always,
- *    or things will break badly.
- *    If %BIOSET_NEED_BVECS is set in @flags, a separate pool will be allocated
- *    for allocating iovecs.  This pool is not needed e.g. for bio_clone_fast().
- *    If %BIOSET_NEED_RESCUER is set, a workqueue is created which can be used to
- *    dispatch queued requests when the mempool runs out of space.
- *
- */
-struct bio_set *bioset_create(unsigned int pool_size,
-			      unsigned int front_pad,
-			      int flags)
-{
-	struct bio_set *bs;
-
-	bs = kzalloc(sizeof(*bs), GFP_KERNEL);
-	if (!bs)
-		return NULL;
-
-	if (bioset_init(bs, pool_size, front_pad, flags)) {
-		kfree(bs);
-		return NULL;
-	}
-
-	return bs;
-}
-EXPORT_SYMBOL(bioset_create);
-
 #ifdef CONFIG_BLK_CGROUP
 
 /**

include/linux/bio.h

@@ -410,14 +410,12 @@ static inline struct bio *bio_next_split(struct bio *bio, int sectors,
 	return bio_split(bio, sectors, gfp, bs);
 }
 
-extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags);
-extern void bioset_exit(struct bio_set *);
-extern struct bio_set *bioset_create(unsigned int, unsigned int, int flags);
 enum {
 	BIOSET_NEED_BVECS = BIT(0),
 	BIOSET_NEED_RESCUER = BIT(1),
 };
-extern void bioset_free(struct bio_set *);
+extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags);
+extern void bioset_exit(struct bio_set *);
 extern int biovec_init_pool(mempool_t *pool, int pool_entries);
 
 extern struct bio *bio_alloc_bioset(gfp_t, unsigned int, struct bio_set *);