gfs2: switch to ->free_inode()

... and use GFS2_I() to get the containing gfs2_inode by inode;
yes, we can feed the address of the first member of structure
to kmem_cache_free(), but let's do it in an obviously safe way.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca71163..7b8d230 100644 (file)
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1736,20 +1736,14 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
        return &ip->i_inode;
 }
 
-static void gfs2_i_callback(struct rcu_head *head)
+static void gfs2_free_inode(struct inode *inode)
 {
-       struct inode *inode = container_of(head, struct inode, i_rcu);
-       kmem_cache_free(gfs2_inode_cachep, inode);
-}
-
-static void gfs2_destroy_inode(struct inode *inode)
-{
-       call_rcu(&inode->i_rcu, gfs2_i_callback);
+       kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
 }
 
 const struct super_operations gfs2_super_ops = {
        .alloc_inode            = gfs2_alloc_inode,
-       .destroy_inode          = gfs2_destroy_inode,
+       .free_inode             = gfs2_free_inode,
        .write_inode            = gfs2_write_inode,
        .dirty_inode            = gfs2_dirty_inode,
        .evict_inode            = gfs2_evict_inode,