udf: add extent cache support in case of file reading

[firefly-linux-kernel-4.4.55.git] / fs / udf / super.c

diff --git a/fs/udf/super.c b/fs/udf/super.c
index 186adbf94b20b770ce29f7bf503f48c20eac2e3b..da8ce9f14387aab98fbdc8f6c3048b66d48bdc61 100644 (file)
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -134,6 +134,8 @@ static struct inode *udf_alloc_inode(struct super_block *sb)
        ei->i_next_alloc_goal = 0;
        ei->i_strat4096 = 0;
        init_rwsem(&ei->i_data_sem);
+       ei->cached_extent.lstart = -1;
+       spin_lock_init(&ei->i_extent_cache_lock);
 
        return &ei->vfs_inode;
 }