btrfs: move accessor helpers into accessors.h

[linux-block.git] / fs / btrfs / free-space-cache.c

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index f4023651dd68bd704a8efceb893649919573eb28..26ff1a5100b9ac4515f93165ef6c4aa672b11f4f 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -11,8 +11,10 @@
 #include <linux/ratelimit.h>
 #include <linux/error-injection.h>
 #include <linux/sched/mm.h>
-#include "misc.h"
 #include "ctree.h"
+#include "fs.h"
+#include "messages.h"
+#include "misc.h"
 #include "free-space-cache.h"
 #include "transaction.h"
 #include "disk-io.h"
@@ -24,11 +26,15 @@
 #include "discard.h"
 #include "subpage.h"
 #include "inode-item.h"
+#include "accessors.h"
 
 #define BITS_PER_BITMAP                (PAGE_SIZE * 8UL)
 #define MAX_CACHE_BYTES_PER_GIG        SZ_64K
 #define FORCE_EXTENT_THRESHOLD SZ_1M
 
+static struct kmem_cache *btrfs_free_space_cachep;
+static struct kmem_cache *btrfs_free_space_bitmap_cachep;
+
 struct btrfs_trim_range {
        u64 start;
        u64 bytes;
@@ -4132,6 +4138,31 @@ out:
        return ret;
 }
 
+int __init btrfs_free_space_init(void)
+{
+       btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space",
+                       sizeof(struct btrfs_free_space), 0,
+                       SLAB_MEM_SPREAD, NULL);
+       if (!btrfs_free_space_cachep)
+               return -ENOMEM;
+
+       btrfs_free_space_bitmap_cachep = kmem_cache_create("btrfs_free_space_bitmap",
+                                                       PAGE_SIZE, PAGE_SIZE,
+                                                       SLAB_MEM_SPREAD, NULL);
+       if (!btrfs_free_space_bitmap_cachep) {
+               kmem_cache_destroy(btrfs_free_space_cachep);
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+void __cold btrfs_free_space_exit(void)
+{
+       kmem_cache_destroy(btrfs_free_space_cachep);
+       kmem_cache_destroy(btrfs_free_space_bitmap_cachep);
+}
+
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 /*
  * Use this if you need to make a bitmap or extent entry specifically, it