lib/radix-tree: Convert to hotplug state machine
Install the callbacks via the state machine.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20161103145021.28528-6-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 8e6d552..4b8bb36 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1642,32 +1642,31 @@
}
}
-static int radix_tree_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int radix_tree_cpu_dead(unsigned int cpu)
{
- int cpu = (long)hcpu;
struct radix_tree_preload *rtp;
struct radix_tree_node *node;
/* Free per-cpu pool of preloaded nodes */
- if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
- rtp = &per_cpu(radix_tree_preloads, cpu);
- while (rtp->nr) {
- node = rtp->nodes;
- rtp->nodes = node->private_data;
- kmem_cache_free(radix_tree_node_cachep, node);
- rtp->nr--;
- }
+ rtp = &per_cpu(radix_tree_preloads, cpu);
+ while (rtp->nr) {
+ node = rtp->nodes;
+ rtp->nodes = node->private_data;
+ kmem_cache_free(radix_tree_node_cachep, node);
+ rtp->nr--;
}
- return NOTIFY_OK;
+ return 0;
}
void __init radix_tree_init(void)
{
+ int ret;
radix_tree_node_cachep = kmem_cache_create("radix_tree_node",
sizeof(struct radix_tree_node), 0,
SLAB_PANIC | SLAB_RECLAIM_ACCOUNT,
radix_tree_node_ctor);
radix_tree_init_maxnodes();
- hotcpu_notifier(radix_tree_callback, 0);
+ ret = cpuhp_setup_state_nocalls(CPUHP_RADIX_DEAD, "lib/radix:dead",
+ NULL, radix_tree_cpu_dead);
+ WARN_ON(ret < 0);
}