Replace the fs_info->cache_workers with the newly created
btrfs_workqueue.

Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
Tested-by: David Sterba <dste...@suse.cz>
---
Changelog:
v1->v2:
  None
v2->v3:
  - Use the btrfs_workqueue_struct to replace submit_workers.
v3->v4:
  - Use the simplified btrfs_alloc_workqueue API.
v4->v5:
  None
---
 fs/btrfs/ctree.h       |  4 ++--
 fs/btrfs/disk-io.c     | 10 +++++-----
 fs/btrfs/extent-tree.c |  6 +++---
 fs/btrfs/super.c       |  2 +-
 4 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index a7b0bdd..06a64fb 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1221,7 +1221,7 @@ struct btrfs_caching_control {
        struct list_head list;
        struct mutex mutex;
        wait_queue_head_t wait;
-       struct btrfs_work work;
+       struct btrfs_work_struct work;
        struct btrfs_block_group_cache *block_group;
        u64 progress;
        atomic_t count;
@@ -1516,7 +1516,7 @@ struct btrfs_fs_info {
        struct btrfs_workqueue_struct *endio_write_workers;
        struct btrfs_workqueue_struct *endio_freespace_worker;
        struct btrfs_workqueue_struct *submit_workers;
-       struct btrfs_workers caching_workers;
+       struct btrfs_workqueue_struct *caching_workers;
        struct btrfs_workers readahead_workers;
 
        /*
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 12586b1..391cadf 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2003,7 +2003,7 @@ static void btrfs_stop_all_workers(struct btrfs_fs_info 
*fs_info)
        btrfs_destroy_workqueue(fs_info->endio_freespace_worker);
        btrfs_destroy_workqueue(fs_info->submit_workers);
        btrfs_stop_workers(&fs_info->delayed_workers);
-       btrfs_stop_workers(&fs_info->caching_workers);
+       btrfs_destroy_workqueue(fs_info->caching_workers);
        btrfs_stop_workers(&fs_info->readahead_workers);
        btrfs_destroy_workqueue(fs_info->flush_workers);
        btrfs_stop_workers(&fs_info->qgroup_rescan_workers);
@@ -2481,8 +2481,8 @@ int open_ctree(struct super_block *sb,
        fs_info->flush_workers =
                btrfs_alloc_workqueue("flush_delalloc", flags, max_active, 0);
 
-       btrfs_init_workers(&fs_info->caching_workers, "cache",
-                          fs_info->thread_pool_size, NULL);
+       fs_info->caching_workers =
+               btrfs_alloc_workqueue("cache", flags, max_active, 0);
 
        /*
         * a higher idle thresh on the submit workers makes it much more
@@ -2533,7 +2533,6 @@ int open_ctree(struct super_block *sb,
        ret = btrfs_start_workers(&fs_info->generic_worker);
        ret |= btrfs_start_workers(&fs_info->fixup_workers);
        ret |= btrfs_start_workers(&fs_info->delayed_workers);
-       ret |= btrfs_start_workers(&fs_info->caching_workers);
        ret |= btrfs_start_workers(&fs_info->readahead_workers);
        ret |= btrfs_start_workers(&fs_info->qgroup_rescan_workers);
        if (ret) {
@@ -2545,7 +2544,8 @@ int open_ctree(struct super_block *sb,
              fs_info->endio_workers && fs_info->endio_meta_workers &&
              fs_info->endio_meta_write_workers &&
              fs_info->endio_write_workers && fs_info->endio_raid56_workers &&
-             fs_info->endio_freespace_worker && fs_info->rmw_workers)) {
+             fs_info->endio_freespace_worker && fs_info->rmw_workers &&
+             fs_info->caching_workers)) {
                err = -ENOMEM;
                goto fail_sb_buffer;
        }
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 32312e0..bb58082 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -378,7 +378,7 @@ static u64 add_new_free_space(struct 
btrfs_block_group_cache *block_group,
        return total_added;
 }
 
-static noinline void caching_thread(struct btrfs_work *work)
+static noinline void caching_thread(struct btrfs_work_struct *work)
 {
        struct btrfs_block_group_cache *block_group;
        struct btrfs_fs_info *fs_info;
@@ -549,7 +549,7 @@ static int cache_block_group(struct btrfs_block_group_cache 
*cache,
        caching_ctl->block_group = cache;
        caching_ctl->progress = cache->key.objectid;
        atomic_set(&caching_ctl->count, 1);
-       caching_ctl->work.func = caching_thread;
+       btrfs_init_work(&caching_ctl->work, caching_thread, NULL, NULL);
 
        spin_lock(&cache->lock);
        /*
@@ -640,7 +640,7 @@ static int cache_block_group(struct btrfs_block_group_cache 
*cache,
 
        btrfs_get_block_group(cache);
 
-       btrfs_queue_worker(&fs_info->caching_workers, &caching_ctl->work);
+       btrfs_queue_work(fs_info->caching_workers, &caching_ctl->work);
 
        return ret;
 }
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 919eb36..cd52e20 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1320,7 +1320,7 @@ static void btrfs_resize_thread_pool(struct btrfs_fs_info 
*fs_info,
        btrfs_workqueue_set_max(fs_info->workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->delalloc_workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->submit_workers, new_pool_size);
-       btrfs_set_max_workers(&fs_info->caching_workers, new_pool_size);
+       btrfs_workqueue_set_max(fs_info->caching_workers, new_pool_size);
        btrfs_set_max_workers(&fs_info->fixup_workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->endio_workers, new_pool_size);
        btrfs_workqueue_set_max(fs_info->endio_meta_workers, new_pool_size);
-- 
1.9.0

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