Revert "kernfs: implement kernfs_{de|re}activate[_self]()"

This reverts commit 9f010c2ad5194a4b682e747984477850fabd03be.

Tejun writes:
        I'm sorry but can you please revert the whole series?
        get_active() waiting while a node is deactivated has potential
        to lead to deadlock and that deactivate/reactivate interface is
        something fundamentally flawed and that cgroup will have to work
        with the remove_self() like everybody else.  IOW, I think the
        first posting was correct.

Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index ac8693027058..9b5a4bb88c64 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -80,8 +80,6 @@ struct kernfs_elem_attr {
 struct kernfs_node {
         atomic_t                count;
         atomic_t                active;
-        int                     deact_depth;
-        unsigned int            hash;   /* ns + name hash */
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
         struct lockdep_map      dep_map;
 #endif
@@ -92,6 +90,7 @@ struct kernfs_node {
         struct rb_node          rb;
 
         const void              *ns;    /* namespace tag */
+        unsigned int            hash;   /* ns + name hash */
         union {
                 struct kernfs_elem_dir          dir;
                 struct kernfs_elem_symlink      symlink;
@@ -234,10 +233,6 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent,
 struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
                                        const char *name,
                                        struct kernfs_node *target);
-void kernfs_deactivate(struct kernfs_node *kn);
-void kernfs_reactivate(struct kernfs_node *kn);
-void kernfs_deactivate_self(struct kernfs_node *kn);
-void kernfs_reactivate_self(struct kernfs_node *kn);
 void kernfs_remove(struct kernfs_node *kn);
 int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
                              const void *ns);