reiserfs: fixup xattr_root caching

 The xattr_root caching was broken from my previous patch set. It wouldn't
 cause corruption, but could cause decreased performance due to allocating
 a larger chunk of the journal (~ 27 blocks) than it would actually use.

 This patch loads the xattr root dentry at xattr initialization and creates
 it on-demand. Since we're using the cached dentry, there's no point
 in keeping lookup_or_create_dir around, so that's removed.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

2 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h
index 6b361d23a499..8651640868a1 100644
--- a/include/linux/reiserfs_fs_sb.h
+++ b/include/linux/reiserfs_fs_sb.h
@@ -402,7 +402,7 @@ struct reiserfs_sb_info {
         int reserved_blocks;    /* amount of blocks reserved for further allocations */
         spinlock_t bitmap_lock; /* this lock on now only used to protect reserved_blocks variable */
         struct dentry *priv_root;       /* root of /.reiserfs_priv */
-        struct dentry *xattr_root;      /* root of /.reiserfs_priv/.xa */
+        struct dentry *xattr_root;      /* root of /.reiserfs_priv/xattrs */
         int j_errno;
 #ifdef CONFIG_QUOTA
         char *s_qf_names[MAXQUOTAS];
diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h
index fea1a8e65bef..cdedc01036e4 100644
--- a/include/linux/reiserfs_xattr.h
+++ b/include/linux/reiserfs_xattr.h
@@ -98,7 +98,7 @@ static inline size_t reiserfs_xattr_jcreate_nblocks(struct inode *inode)
 
         if ((REISERFS_I(inode)->i_flags & i_has_xattr_dir) == 0) {
                 nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
-                if (REISERFS_SB(inode->i_sb)->xattr_root == NULL)
+                if (!REISERFS_SB(inode->i_sb)->xattr_root->d_inode)
                         nblocks += JOURNAL_BLOCKS_PER_OBJECT(inode->i_sb);
         }