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-rw-r--r--fs/nilfs2/alloc.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/nilfs2/alloc.h b/fs/nilfs2/alloc.h
index 4ace5475c2c7..f4543ac4f560 100644
--- a/fs/nilfs2/alloc.h
+++ b/fs/nilfs2/alloc.h
@@ -69,4 +69,25 @@ int nilfs_palloc_freev(struct inode *, __u64 *, size_t);
#define nilfs_clear_bit_atomic ext2_clear_bit_atomic
#define nilfs_find_next_zero_bit ext2_find_next_zero_bit
+/*
+ * persistent object allocator cache
+ */
+
+struct nilfs_bh_assoc {
+ unsigned long blkoff;
+ struct buffer_head *bh;
+};
+
+struct nilfs_palloc_cache {
+ spinlock_t lock;
+ struct nilfs_bh_assoc prev_desc;
+ struct nilfs_bh_assoc prev_bitmap;
+ struct nilfs_bh_assoc prev_entry;
+};
+
+void nilfs_palloc_setup_cache(struct inode *inode,
+ struct nilfs_palloc_cache *cache);
+void nilfs_palloc_clear_cache(struct inode *inode);
+void nilfs_palloc_destroy_cache(struct inode *inode);
+
#endif /* _NILFS_ALLOC_H */