Commit 8e6af017 authored by Ethan Hansen's avatar Ethan Hansen Committed by Paul E. McKenney
Browse files

rcu: Remove unused function hlist_bl_del_init_rcu() 



The function hlist_bl_del_init_rcu() is declared in rculist_bl.h,
but never used.  This commit therefore removes it.

Signed-off-by: default avatarEthan Hansen <1ethanhansen@gmail.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 54ecb8f7

include/linux/rculist_bl.h

+0 −28
Original line number Diff line number Diff line
@@ -24,34 +24,6 @@ static inline struct hlist_bl_node *hlist_bl_first_rcu(struct hlist_bl_head *h) 
		((unsigned long)rcu_dereference_check(h->first, hlist_bl_is_locked(h)) & ~LIST_BL_LOCKMASK);

}



/**

 * hlist_bl_del_init_rcu - deletes entry from hash list with re-initialization

 * @n: the element to delete from the hash list.

 *

 * Note: hlist_bl_unhashed() on the node returns true after this. It is

 * useful for RCU based read lockfree traversal if the writer side

 * must know if the list entry is still hashed or already unhashed.

 *

 * In particular, it means that we can not poison the forward pointers

 * that may still be used for walking the hash list and we can only

 * zero the pprev pointer so list_unhashed() will return true after

 * this.

 *

 * The caller must take whatever precautions are necessary (such as

 * holding appropriate locks) to avoid racing with another

 * list-mutation primitive, such as hlist_bl_add_head_rcu() or

 * hlist_bl_del_rcu(), running on this same list.  However, it is

 * perfectly legal to run concurrently with the _rcu list-traversal

 * primitives, such as hlist_bl_for_each_entry_rcu().

 */

static inline void hlist_bl_del_init_rcu(struct hlist_bl_node *n)

{

	if (!hlist_bl_unhashed(n)) {

		__hlist_bl_del(n);

		n->pprev = NULL;

	}

}



/**

 * hlist_bl_del_rcu - deletes entry from hash list without re-initialization

 * @n: the element to delete from the hash list.