diff options
Diffstat (limited to 'block/blk-mq-cpu.c')
-rw-r--r-- | block/blk-mq-cpu.c | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c deleted file mode 100644 index bb3ed488f7b5..000000000000 --- a/block/blk-mq-cpu.c +++ /dev/null @@ -1,67 +0,0 @@ -/* - * CPU notifier helper code for blk-mq - * - * Copyright (C) 2013-2014 Jens Axboe - */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/blkdev.h> -#include <linux/list.h> -#include <linux/llist.h> -#include <linux/smp.h> -#include <linux/cpu.h> - -#include <linux/blk-mq.h> -#include "blk-mq.h" - -static LIST_HEAD(blk_mq_cpu_notify_list); -static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock); - -static int blk_mq_main_cpu_notify(struct notifier_block *self, - unsigned long action, void *hcpu) -{ - unsigned int cpu = (unsigned long) hcpu; - struct blk_mq_cpu_notifier *notify; - int ret = NOTIFY_OK; - - raw_spin_lock(&blk_mq_cpu_notify_lock); - - list_for_each_entry(notify, &blk_mq_cpu_notify_list, list) { - ret = notify->notify(notify->data, action, cpu); - if (ret != NOTIFY_OK) - break; - } - - raw_spin_unlock(&blk_mq_cpu_notify_lock); - return ret; -} - -void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier) -{ - BUG_ON(!notifier->notify); - - raw_spin_lock(&blk_mq_cpu_notify_lock); - list_add_tail(¬ifier->list, &blk_mq_cpu_notify_list); - raw_spin_unlock(&blk_mq_cpu_notify_lock); -} - -void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier) -{ - raw_spin_lock(&blk_mq_cpu_notify_lock); - list_del(¬ifier->list); - raw_spin_unlock(&blk_mq_cpu_notify_lock); -} - -void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier, - int (*fn)(void *, unsigned long, unsigned int), - void *data) -{ - notifier->notify = fn; - notifier->data = data; -} - -void __init blk_mq_cpu_init(void) -{ - hotcpu_notifier(blk_mq_main_cpu_notify, 0); -} |