dm: remove unused _rq_bio_info_cache

Remove _rq_bio_info_cache, which is no longer used.
No functional changes.

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 10 insertions, 21 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 1016c14c28a0..031f1f1c711b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -205,12 +205,6 @@ struct dm_md_mempools {
 static struct kmem_cache *_io_cache;
 static struct kmem_cache *_rq_tio_cache;
 
-/*
- * Unused now, and needs to be deleted. But since io_pool is overloaded and it's
- * still used for _io_cache, I'm leaving this for a later cleanup
- */
-static struct kmem_cache *_rq_bio_info_cache;
-
 static int __init local_init(void)
 {
         int r = -ENOMEM;
@@ -224,13 +218,9 @@ static int __init local_init(void)
         if (!_rq_tio_cache)
                 goto out_free_io_cache;
 
-        _rq_bio_info_cache = KMEM_CACHE(dm_rq_clone_bio_info, 0);
-        if (!_rq_bio_info_cache)
-                goto out_free_rq_tio_cache;
-
         r = dm_uevent_init();
         if (r)
-                goto out_free_rq_bio_info_cache;
+                goto out_free_rq_tio_cache;
 
         _major = major;
         r = register_blkdev(_major, _name);
@@ -244,8 +234,6 @@ static int __init local_init(void)
 
 out_uevent_exit:
         dm_uevent_exit();
-out_free_rq_bio_info_cache:
-        kmem_cache_destroy(_rq_bio_info_cache);
 out_free_rq_tio_cache:
         kmem_cache_destroy(_rq_tio_cache);
 out_free_io_cache:
@@ -256,7 +244,6 @@ out_free_io_cache:
 
 static void local_exit(void)
 {
-        kmem_cache_destroy(_rq_bio_info_cache);
         kmem_cache_destroy(_rq_tio_cache);
         kmem_cache_destroy(_io_cache);
         unregister_blkdev(_major, _name);
@@ -1986,7 +1973,7 @@ static void __bind_mempools(struct mapped_device *md, struct dm_table *t)
 {
         struct dm_md_mempools *p = dm_table_get_md_mempools(t);
 
-        if (md->io_pool && md->bs) {
+        if (md->bs) {
                 /* The md already has necessary mempools. */
                 if (dm_table_get_type(t) == DM_TYPE_BIO_BASED) {
                         /*
@@ -2780,11 +2767,12 @@ struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity, u
 
         per_bio_data_size = roundup(per_bio_data_size, __alignof__(struct dm_target_io));
 
-        pools->io_pool = (type == DM_TYPE_BIO_BASED) ?
-                         mempool_create_slab_pool(MIN_IOS, _io_cache) :
-                         mempool_create_slab_pool(MIN_IOS, _rq_bio_info_cache);
-        if (!pools->io_pool)
-                goto free_pools_and_out;
+        pools->io_pool = NULL;
+        if (type == DM_TYPE_BIO_BASED) {
+                pools->io_pool = mempool_create_slab_pool(MIN_IOS, _io_cache);
+                if (!pools->io_pool)
+                        goto free_pools_and_out;
+        }
 
         pools->tio_pool = NULL;
         if (type == DM_TYPE_REQUEST_BASED) {
@@ -2814,7 +2802,8 @@ free_tio_pool_and_out:
                 mempool_destroy(pools->tio_pool);
 
 free_io_pool_and_out:
-        mempool_destroy(pools->io_pool);
+        if (pools->io_pool)
+                mempool_destroy(pools->io_pool);
 
 free_pools_and_out:
         kfree(pools);