From: Paul E. McKenney <paulmck@kernel.org>
Date: Tue, 18 May 2021 17:56:19 +0000 (-0700)
Subject: Merge branches 'bitmaprange.2021.05.10c', 'doc.2021.05.10c', 'fixes.2021.05.13a'... 
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=641faf1b9064c270a476a424e60063bb05df3ee9;p=uclinux-h8%2Flinux.git

Merge branches 'bitmaprange.2021.05.10c', 'doc.2021.05.10c', 'fixes.2021.05.13a', 'kvfree_rcu.2021.05.10c', 'mmdumpobj.2021.05.10c', 'nocb.2021.05.12a', 'srcu.2021.05.12a', 'tasks.2021.05.18a' and 'torture.2021.05.10c' into HEAD

bitmaprange.2021.05.10c: Allow "all" for bitmap ranges.
doc.2021.05.10c: Documentation updates.
fixes.2021.05.13a: Miscellaneous fixes.
kvfree_rcu.2021.05.10c: kvfree_rcu() updates.
mmdumpobj.2021.05.10c: mem_dump_obj() updates.
nocb.2021.05.12a: RCU NOCB CPU updates, including limited deoffloading.
srcu.2021.05.12a: SRCU updates.
tasks.2021.05.18a: Tasks-RCU updates.
torture.2021.05.10c: Torture-test updates.
---

641faf1b9064c270a476a424e60063bb05df3ee9
diff --cc kernel/rcu/tree.c
index 8e78b2430c16,8e78b2430c16,4b00e4fbfa10,618ec9152e5e,8e78b2430c16,ed1b5465b3e8,0420b23fc9d0,f4daa4e60b14,8e78b2430c16..28f1093027b9
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@@@@@@@@@ -3251,9 -3251,9 -3233,9 -3264,28 -3251,9 -3251,9 -3251,9 -3252,9 -3251,9 +3247,28 @@@@@@@@@@ put_cached_bnode(struct kfree_rcu_cpu *
         		return false;
         
         	llist_add((struct llist_node *) bnode, &krcp->bkvcache);
--- -----	krcp->nr_bkv_objs++;
+++ +++++	WRITE_ONCE(krcp->nr_bkv_objs, krcp->nr_bkv_objs + 1);
         	return true;
+++ +++++}
+++ +++++
+++ +++++static int
+++ +++++drain_page_cache(struct kfree_rcu_cpu *krcp)
+++ +++++{
+++ +++++	unsigned long flags;
+++ +++++	struct llist_node *page_list, *pos, *n;
+++ +++++	int freed = 0;
  +   +  
+++ +++++	raw_spin_lock_irqsave(&krcp->lock, flags);
+++ +++++	page_list = llist_del_all(&krcp->bkvcache);
+++ +++++	WRITE_ONCE(krcp->nr_bkv_objs, 0);
+++ +++++	raw_spin_unlock_irqrestore(&krcp->lock, flags);
++  +++++
+++ +++++	llist_for_each_safe(pos, n, page_list) {
+++ +++++		free_page((unsigned long)pos);
+++ +++++		freed++;
+++ +++++	}
+++ ++ ++
+++ +++++	return freed;
         }
         
         /*