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lib/radix-tree: Convert to hotplug state machine

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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>
This commit is contained in:
Sebastian Andrzej Siewior 2016-11-03 15:50:01 +01:00 committed by Thomas Gleixner
parent 5588f5afb4
commit d544abd5ff
2 changed files with 13 additions and 13 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
include/linux/cpuhotplug.h
View file

@ -34,6 +34,7 @@ enum cpuhp_state {
CPUHP_PRINTK_DEAD,
CPUHP_MM_MEMCQ_DEAD,
CPUHP_PERCPU_CNT_DEAD,
CPUHP_RADIX_DEAD,
CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE,

25
lib/radix-tree.c
View file

@ -1642,32 +1642,31 @@ static __init void radix_tree_init_maxnodes(void)
}
}
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);
}