mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-25 21:24:08 +08:00
Merge branch 'for-4.2/core' into for-4.2/drivers
We need the blkdev_reread_part() changes for drivers to adapt.
This commit is contained in:
commit
b816d45fd5
@ -1522,7 +1522,8 @@ bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
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* Caller must ensure !blk_queue_nomerges(q) beforehand.
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*/
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bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
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unsigned int *request_count)
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unsigned int *request_count,
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struct request **same_queue_rq)
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{
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struct blk_plug *plug;
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struct request *rq;
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@ -1542,8 +1543,16 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
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list_for_each_entry_reverse(rq, plug_list, queuelist) {
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int el_ret;
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if (rq->q == q)
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if (rq->q == q) {
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(*request_count)++;
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/*
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* Only blk-mq multiple hardware queues case checks the
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* rq in the same queue, there should be only one such
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* rq in a queue
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**/
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if (same_queue_rq)
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*same_queue_rq = rq;
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}
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if (rq->q != q || !blk_rq_merge_ok(rq, bio))
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continue;
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@ -1608,7 +1617,7 @@ void blk_queue_bio(struct request_queue *q, struct bio *bio)
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* any locks.
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*/
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if (!blk_queue_nomerges(q) &&
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blk_attempt_plug_merge(q, bio, &request_count))
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blk_attempt_plug_merge(q, bio, &request_count, NULL))
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return;
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spin_lock_irq(q->queue_lock);
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@ -1716,8 +1725,6 @@ static void handle_bad_sector(struct bio *bio)
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bio->bi_rw,
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(unsigned long long)bio_end_sector(bio),
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(long long)(i_size_read(bio->bi_bdev->bd_inode) >> 9));
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set_bit(BIO_EOF, &bio->bi_flags);
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}
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#ifdef CONFIG_FAIL_MAKE_REQUEST
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@ -3032,21 +3039,20 @@ void blk_start_plug(struct blk_plug *plug)
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{
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struct task_struct *tsk = current;
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/*
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* If this is a nested plug, don't actually assign it.
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*/
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if (tsk->plug)
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return;
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INIT_LIST_HEAD(&plug->list);
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INIT_LIST_HEAD(&plug->mq_list);
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INIT_LIST_HEAD(&plug->cb_list);
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/*
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* If this is a nested plug, don't actually assign it. It will be
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* flushed on its own.
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* Store ordering should not be needed here, since a potential
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* preempt will imply a full memory barrier
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*/
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if (!tsk->plug) {
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/*
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* Store ordering should not be needed here, since a potential
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* preempt will imply a full memory barrier
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*/
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tsk->plug = plug;
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}
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tsk->plug = plug;
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}
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EXPORT_SYMBOL(blk_start_plug);
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@ -3193,10 +3199,11 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
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void blk_finish_plug(struct blk_plug *plug)
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{
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if (plug != current->plug)
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return;
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blk_flush_plug_list(plug, false);
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if (plug == current->plug)
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current->plug = NULL;
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current->plug = NULL;
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}
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EXPORT_SYMBOL(blk_finish_plug);
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|
148
block/blk-mq.c
148
block/blk-mq.c
@ -89,7 +89,8 @@ static int blk_mq_queue_enter(struct request_queue *q, gfp_t gfp)
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return -EBUSY;
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ret = wait_event_interruptible(q->mq_freeze_wq,
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!q->mq_freeze_depth || blk_queue_dying(q));
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!atomic_read(&q->mq_freeze_depth) ||
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blk_queue_dying(q));
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if (blk_queue_dying(q))
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return -ENODEV;
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if (ret)
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@ -112,13 +113,10 @@ static void blk_mq_usage_counter_release(struct percpu_ref *ref)
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void blk_mq_freeze_queue_start(struct request_queue *q)
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{
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bool freeze;
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int freeze_depth;
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spin_lock_irq(q->queue_lock);
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freeze = !q->mq_freeze_depth++;
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spin_unlock_irq(q->queue_lock);
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if (freeze) {
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freeze_depth = atomic_inc_return(&q->mq_freeze_depth);
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if (freeze_depth == 1) {
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percpu_ref_kill(&q->mq_usage_counter);
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blk_mq_run_hw_queues(q, false);
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}
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@ -143,13 +141,11 @@ EXPORT_SYMBOL_GPL(blk_mq_freeze_queue);
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void blk_mq_unfreeze_queue(struct request_queue *q)
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{
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bool wake;
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int freeze_depth;
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spin_lock_irq(q->queue_lock);
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wake = !--q->mq_freeze_depth;
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WARN_ON_ONCE(q->mq_freeze_depth < 0);
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spin_unlock_irq(q->queue_lock);
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if (wake) {
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freeze_depth = atomic_dec_return(&q->mq_freeze_depth);
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WARN_ON_ONCE(freeze_depth < 0);
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if (!freeze_depth) {
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percpu_ref_reinit(&q->mq_usage_counter);
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wake_up_all(&q->mq_freeze_wq);
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}
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@ -1224,6 +1220,38 @@ static struct request *blk_mq_map_request(struct request_queue *q,
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return rq;
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}
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static int blk_mq_direct_issue_request(struct request *rq)
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{
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int ret;
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struct request_queue *q = rq->q;
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struct blk_mq_hw_ctx *hctx = q->mq_ops->map_queue(q,
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rq->mq_ctx->cpu);
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struct blk_mq_queue_data bd = {
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.rq = rq,
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.list = NULL,
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.last = 1
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};
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/*
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* For OK queue, we are done. For error, kill it. Any other
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* error (busy), just add it to our list as we previously
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* would have done
|
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*/
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ret = q->mq_ops->queue_rq(hctx, &bd);
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if (ret == BLK_MQ_RQ_QUEUE_OK)
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return 0;
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else {
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__blk_mq_requeue_request(rq);
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if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
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rq->errors = -EIO;
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blk_mq_end_request(rq, rq->errors);
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return 0;
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}
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return -1;
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}
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}
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/*
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* Multiple hardware queue variant. This will not use per-process plugs,
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* but will attempt to bypass the hctx queueing if we can go straight to
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@ -1235,6 +1263,9 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
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const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
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struct blk_map_ctx data;
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struct request *rq;
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unsigned int request_count = 0;
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struct blk_plug *plug;
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struct request *same_queue_rq = NULL;
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blk_queue_bounce(q, &bio);
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@ -1243,6 +1274,10 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
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return;
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}
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if (!is_flush_fua && !blk_queue_nomerges(q) &&
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blk_attempt_plug_merge(q, bio, &request_count, &same_queue_rq))
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return;
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rq = blk_mq_map_request(q, bio, &data);
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if (unlikely(!rq))
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return;
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@ -1253,38 +1288,42 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
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goto run_queue;
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}
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plug = current->plug;
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/*
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* If the driver supports defer issued based on 'last', then
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* queue it up like normal since we can potentially save some
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* CPU this way.
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*/
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if (is_sync && !(data.hctx->flags & BLK_MQ_F_DEFER_ISSUE)) {
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struct blk_mq_queue_data bd = {
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.rq = rq,
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.list = NULL,
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.last = 1
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};
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int ret;
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if (((plug && !blk_queue_nomerges(q)) || is_sync) &&
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!(data.hctx->flags & BLK_MQ_F_DEFER_ISSUE)) {
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struct request *old_rq = NULL;
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blk_mq_bio_to_request(rq, bio);
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/*
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* For OK queue, we are done. For error, kill it. Any other
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* error (busy), just add it to our list as we previously
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* would have done
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* we do limited pluging. If bio can be merged, do merge.
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* Otherwise the existing request in the plug list will be
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* issued. So the plug list will have one request at most
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*/
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ret = q->mq_ops->queue_rq(data.hctx, &bd);
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if (ret == BLK_MQ_RQ_QUEUE_OK)
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goto done;
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else {
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__blk_mq_requeue_request(rq);
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if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
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rq->errors = -EIO;
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blk_mq_end_request(rq, rq->errors);
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goto done;
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if (plug) {
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/*
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* The plug list might get flushed before this. If that
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* happens, same_queue_rq is invalid and plug list is empty
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**/
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if (same_queue_rq && !list_empty(&plug->mq_list)) {
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old_rq = same_queue_rq;
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list_del_init(&old_rq->queuelist);
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}
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}
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list_add_tail(&rq->queuelist, &plug->mq_list);
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} else /* is_sync */
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old_rq = rq;
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blk_mq_put_ctx(data.ctx);
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if (!old_rq)
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return;
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if (!blk_mq_direct_issue_request(old_rq))
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return;
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blk_mq_insert_request(old_rq, false, true, true);
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return;
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}
|
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|
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if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
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@ -1297,7 +1336,6 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
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run_queue:
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blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua);
|
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}
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done:
|
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blk_mq_put_ctx(data.ctx);
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||||
}
|
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|
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@ -1309,16 +1347,11 @@ static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
|
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{
|
||||
const int is_sync = rw_is_sync(bio->bi_rw);
|
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const int is_flush_fua = bio->bi_rw & (REQ_FLUSH | REQ_FUA);
|
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unsigned int use_plug, request_count = 0;
|
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struct blk_plug *plug;
|
||||
unsigned int request_count = 0;
|
||||
struct blk_map_ctx data;
|
||||
struct request *rq;
|
||||
|
||||
/*
|
||||
* If we have multiple hardware queues, just go directly to
|
||||
* one of those for sync IO.
|
||||
*/
|
||||
use_plug = !is_flush_fua && !is_sync;
|
||||
|
||||
blk_queue_bounce(q, &bio);
|
||||
|
||||
if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
|
||||
@ -1326,8 +1359,8 @@ static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
|
||||
return;
|
||||
}
|
||||
|
||||
if (use_plug && !blk_queue_nomerges(q) &&
|
||||
blk_attempt_plug_merge(q, bio, &request_count))
|
||||
if (!is_flush_fua && !blk_queue_nomerges(q) &&
|
||||
blk_attempt_plug_merge(q, bio, &request_count, NULL))
|
||||
return;
|
||||
|
||||
rq = blk_mq_map_request(q, bio, &data);
|
||||
@ -1345,21 +1378,18 @@ static void blk_sq_make_request(struct request_queue *q, struct bio *bio)
|
||||
* utilize that to temporarily store requests until the task is
|
||||
* either done or scheduled away.
|
||||
*/
|
||||
if (use_plug) {
|
||||
struct blk_plug *plug = current->plug;
|
||||
|
||||
if (plug) {
|
||||
blk_mq_bio_to_request(rq, bio);
|
||||
if (list_empty(&plug->mq_list))
|
||||
trace_block_plug(q);
|
||||
else if (request_count >= BLK_MAX_REQUEST_COUNT) {
|
||||
blk_flush_plug_list(plug, false);
|
||||
trace_block_plug(q);
|
||||
}
|
||||
list_add_tail(&rq->queuelist, &plug->mq_list);
|
||||
blk_mq_put_ctx(data.ctx);
|
||||
return;
|
||||
plug = current->plug;
|
||||
if (plug) {
|
||||
blk_mq_bio_to_request(rq, bio);
|
||||
if (list_empty(&plug->mq_list))
|
||||
trace_block_plug(q);
|
||||
else if (request_count >= BLK_MAX_REQUEST_COUNT) {
|
||||
blk_flush_plug_list(plug, false);
|
||||
trace_block_plug(q);
|
||||
}
|
||||
list_add_tail(&rq->queuelist, &plug->mq_list);
|
||||
blk_mq_put_ctx(data.ctx);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
|
||||
@ -2047,7 +2077,7 @@ void blk_mq_free_queue(struct request_queue *q)
|
||||
/* Basically redo blk_mq_init_queue with queue frozen */
|
||||
static void blk_mq_queue_reinit(struct request_queue *q)
|
||||
{
|
||||
WARN_ON_ONCE(!q->mq_freeze_depth);
|
||||
WARN_ON_ONCE(!atomic_read(&q->mq_freeze_depth));
|
||||
|
||||
blk_mq_sysfs_unregister(q);
|
||||
|
||||
|
@ -78,7 +78,8 @@ bool bio_attempt_front_merge(struct request_queue *q, struct request *req,
|
||||
bool bio_attempt_back_merge(struct request_queue *q, struct request *req,
|
||||
struct bio *bio);
|
||||
bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
|
||||
unsigned int *request_count);
|
||||
unsigned int *request_count,
|
||||
struct request **same_queue_rq);
|
||||
|
||||
void blk_account_io_start(struct request *req, bool new_io);
|
||||
void blk_account_io_completion(struct request *req, unsigned int bytes);
|
||||
|
@ -128,9 +128,6 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
|
||||
struct bio_vec *bvec, *org_vec;
|
||||
int i;
|
||||
|
||||
if (test_bit(BIO_EOPNOTSUPP, &bio->bi_flags))
|
||||
set_bit(BIO_EOPNOTSUPP, &bio_orig->bi_flags);
|
||||
|
||||
/*
|
||||
* free up bounce indirect pages used
|
||||
*/
|
||||
|
@ -150,21 +150,48 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user
|
||||
}
|
||||
}
|
||||
|
||||
static int blkdev_reread_part(struct block_device *bdev)
|
||||
/*
|
||||
* This is an exported API for the block driver, and will not
|
||||
* acquire bd_mutex. This API should be used in case that
|
||||
* caller has held bd_mutex already.
|
||||
*/
|
||||
int __blkdev_reread_part(struct block_device *bdev)
|
||||
{
|
||||
struct gendisk *disk = bdev->bd_disk;
|
||||
int res;
|
||||
|
||||
if (!disk_part_scan_enabled(disk) || bdev != bdev->bd_contains)
|
||||
return -EINVAL;
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EACCES;
|
||||
if (!mutex_trylock(&bdev->bd_mutex))
|
||||
return -EBUSY;
|
||||
res = rescan_partitions(disk, bdev);
|
||||
|
||||
lockdep_assert_held(&bdev->bd_mutex);
|
||||
|
||||
return rescan_partitions(disk, bdev);
|
||||
}
|
||||
EXPORT_SYMBOL(__blkdev_reread_part);
|
||||
|
||||
/*
|
||||
* This is an exported API for the block driver, and will
|
||||
* try to acquire bd_mutex. If bd_mutex has been held already
|
||||
* in current context, please call __blkdev_reread_part().
|
||||
*
|
||||
* Make sure the held locks in current context aren't required
|
||||
* in open()/close() handler and I/O path for avoiding ABBA deadlock:
|
||||
* - bd_mutex is held before calling block driver's open/close
|
||||
* handler
|
||||
* - reading partition table may submit I/O to the block device
|
||||
*/
|
||||
int blkdev_reread_part(struct block_device *bdev)
|
||||
{
|
||||
int res;
|
||||
|
||||
mutex_lock(&bdev->bd_mutex);
|
||||
res = __blkdev_reread_part(bdev);
|
||||
mutex_unlock(&bdev->bd_mutex);
|
||||
|
||||
return res;
|
||||
}
|
||||
EXPORT_SYMBOL(blkdev_reread_part);
|
||||
|
||||
static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
|
||||
uint64_t len, int secure)
|
||||
|
@ -3269,11 +3269,8 @@ static int write_dev_supers(struct btrfs_device *device,
|
||||
*/
|
||||
static void btrfs_end_empty_barrier(struct bio *bio, int err)
|
||||
{
|
||||
if (err) {
|
||||
if (err == -EOPNOTSUPP)
|
||||
set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
|
||||
if (err)
|
||||
clear_bit(BIO_UPTODATE, &bio->bi_flags);
|
||||
}
|
||||
if (bio->bi_private)
|
||||
complete(bio->bi_private);
|
||||
bio_put(bio);
|
||||
@ -3301,11 +3298,7 @@ static int write_dev_flush(struct btrfs_device *device, int wait)
|
||||
|
||||
wait_for_completion(&device->flush_wait);
|
||||
|
||||
if (bio_flagged(bio, BIO_EOPNOTSUPP)) {
|
||||
printk_in_rcu("BTRFS: disabling barriers on dev %s\n",
|
||||
rcu_str_deref(device->name));
|
||||
device->nobarriers = 1;
|
||||
} else if (!bio_flagged(bio, BIO_UPTODATE)) {
|
||||
if (!bio_flagged(bio, BIO_UPTODATE)) {
|
||||
ret = -EIO;
|
||||
btrfs_dev_stat_inc_and_print(device,
|
||||
BTRFS_DEV_STAT_FLUSH_ERRS);
|
||||
|
@ -2767,8 +2767,6 @@ static int __must_check submit_one_bio(int rw, struct bio *bio,
|
||||
else
|
||||
btrfsic_submit_bio(rw, bio);
|
||||
|
||||
if (bio_flagged(bio, BIO_EOPNOTSUPP))
|
||||
ret = -EOPNOTSUPP;
|
||||
bio_put(bio);
|
||||
return ret;
|
||||
}
|
||||
|
10
fs/buffer.c
10
fs/buffer.c
@ -2938,10 +2938,6 @@ static void end_bio_bh_io_sync(struct bio *bio, int err)
|
||||
{
|
||||
struct buffer_head *bh = bio->bi_private;
|
||||
|
||||
if (err == -EOPNOTSUPP) {
|
||||
set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
|
||||
}
|
||||
|
||||
if (unlikely (test_bit(BIO_QUIET,&bio->bi_flags)))
|
||||
set_bit(BH_Quiet, &bh->b_state);
|
||||
|
||||
@ -3041,13 +3037,7 @@ int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags)
|
||||
if (buffer_prio(bh))
|
||||
rw |= REQ_PRIO;
|
||||
|
||||
bio_get(bio);
|
||||
submit_bio(rw, bio);
|
||||
|
||||
if (bio_flagged(bio, BIO_EOPNOTSUPP))
|
||||
ret = -EOPNOTSUPP;
|
||||
|
||||
bio_put(bio);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(_submit_bh);
|
||||
|
@ -359,7 +359,6 @@ void ext4_io_submit(struct ext4_io_submit *io)
|
||||
if (bio) {
|
||||
bio_get(io->io_bio);
|
||||
submit_bio(io->io_op, io->io_bio);
|
||||
BUG_ON(bio_flagged(io->io_bio, BIO_EOPNOTSUPP));
|
||||
bio_put(io->io_bio);
|
||||
}
|
||||
io->io_bio = NULL;
|
||||
|
@ -343,11 +343,6 @@ static void nilfs_end_bio_write(struct bio *bio, int err)
|
||||
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
|
||||
struct nilfs_segment_buffer *segbuf = bio->bi_private;
|
||||
|
||||
if (err == -EOPNOTSUPP) {
|
||||
set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
|
||||
/* to be detected by nilfs_segbuf_submit_bio() */
|
||||
}
|
||||
|
||||
if (!uptodate)
|
||||
atomic_inc(&segbuf->sb_err);
|
||||
|
||||
@ -374,15 +369,8 @@ static int nilfs_segbuf_submit_bio(struct nilfs_segment_buffer *segbuf,
|
||||
|
||||
bio->bi_end_io = nilfs_end_bio_write;
|
||||
bio->bi_private = segbuf;
|
||||
bio_get(bio);
|
||||
submit_bio(mode, bio);
|
||||
segbuf->sb_nbio++;
|
||||
if (bio_flagged(bio, BIO_EOPNOTSUPP)) {
|
||||
bio_put(bio);
|
||||
err = -EOPNOTSUPP;
|
||||
goto failed;
|
||||
}
|
||||
bio_put(bio);
|
||||
|
||||
wi->bio = NULL;
|
||||
wi->rest_blocks -= wi->end - wi->start;
|
||||
|
@ -112,18 +112,15 @@ struct bio {
|
||||
* bio flags
|
||||
*/
|
||||
#define BIO_UPTODATE 0 /* ok after I/O completion */
|
||||
#define BIO_RW_BLOCK 1 /* RW_AHEAD set, and read/write would block */
|
||||
#define BIO_EOF 2 /* out-out-bounds error */
|
||||
#define BIO_SEG_VALID 3 /* bi_phys_segments valid */
|
||||
#define BIO_CLONED 4 /* doesn't own data */
|
||||
#define BIO_BOUNCED 5 /* bio is a bounce bio */
|
||||
#define BIO_USER_MAPPED 6 /* contains user pages */
|
||||
#define BIO_EOPNOTSUPP 7 /* not supported */
|
||||
#define BIO_NULL_MAPPED 8 /* contains invalid user pages */
|
||||
#define BIO_QUIET 9 /* Make BIO Quiet */
|
||||
#define BIO_SNAP_STABLE 10 /* bio data must be snapshotted during write */
|
||||
#define BIO_CHAIN 11 /* chained bio, ->bi_remaining in effect */
|
||||
#define BIO_REFFED 12 /* bio has elevated ->bi_cnt */
|
||||
#define BIO_SEG_VALID 1 /* bi_phys_segments valid */
|
||||
#define BIO_CLONED 2 /* doesn't own data */
|
||||
#define BIO_BOUNCED 3 /* bio is a bounce bio */
|
||||
#define BIO_USER_MAPPED 4 /* contains user pages */
|
||||
#define BIO_NULL_MAPPED 5 /* contains invalid user pages */
|
||||
#define BIO_QUIET 6 /* Make BIO Quiet */
|
||||
#define BIO_SNAP_STABLE 7 /* bio data must be snapshotted during write */
|
||||
#define BIO_CHAIN 8 /* chained bio, ->bi_remaining in effect */
|
||||
#define BIO_REFFED 9 /* bio has elevated ->bi_cnt */
|
||||
|
||||
/*
|
||||
* Flags starting here get preserved by bio_reset() - this includes
|
||||
|
@ -444,7 +444,7 @@ struct request_queue {
|
||||
struct mutex sysfs_lock;
|
||||
|
||||
int bypass_depth;
|
||||
int mq_freeze_depth;
|
||||
atomic_t mq_freeze_depth;
|
||||
|
||||
#if defined(CONFIG_BLK_DEV_BSG)
|
||||
bsg_job_fn *bsg_job_fn;
|
||||
|
@ -2279,6 +2279,9 @@ extern struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
|
||||
extern struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode,
|
||||
void *holder);
|
||||
extern void blkdev_put(struct block_device *bdev, fmode_t mode);
|
||||
extern int __blkdev_reread_part(struct block_device *bdev);
|
||||
extern int blkdev_reread_part(struct block_device *bdev);
|
||||
|
||||
#ifdef CONFIG_SYSFS
|
||||
extern int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk);
|
||||
extern void bd_unlink_disk_holder(struct block_device *bdev,
|
||||
|
@ -377,7 +377,6 @@ extern void end_swap_bio_write(struct bio *bio, int err);
|
||||
extern int __swap_writepage(struct page *page, struct writeback_control *wbc,
|
||||
void (*end_write_func)(struct bio *, int));
|
||||
extern int swap_set_page_dirty(struct page *page);
|
||||
extern void end_swap_bio_read(struct bio *bio, int err);
|
||||
|
||||
int add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,
|
||||
unsigned long nr_pages, sector_t start_block);
|
||||
|
@ -7,8 +7,7 @@ obj-$(CONFIG_VT_CONSOLE_SLEEP) += console.o
|
||||
obj-$(CONFIG_FREEZER) += process.o
|
||||
obj-$(CONFIG_SUSPEND) += suspend.o
|
||||
obj-$(CONFIG_PM_TEST_SUSPEND) += suspend_test.o
|
||||
obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o \
|
||||
block_io.o
|
||||
obj-$(CONFIG_HIBERNATION) += hibernate.o snapshot.o swap.o user.o
|
||||
obj-$(CONFIG_PM_AUTOSLEEP) += autosleep.o
|
||||
obj-$(CONFIG_PM_WAKELOCKS) += wakelock.o
|
||||
|
||||
|
@ -1,103 +0,0 @@
|
||||
/*
|
||||
* This file provides functions for block I/O operations on swap/file.
|
||||
*
|
||||
* Copyright (C) 1998,2001-2005 Pavel Machek <pavel@ucw.cz>
|
||||
* Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl>
|
||||
*
|
||||
* This file is released under the GPLv2.
|
||||
*/
|
||||
|
||||
#include <linux/bio.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/swap.h>
|
||||
|
||||
#include "power.h"
|
||||
|
||||
/**
|
||||
* submit - submit BIO request.
|
||||
* @rw: READ or WRITE.
|
||||
* @off physical offset of page.
|
||||
* @page: page we're reading or writing.
|
||||
* @bio_chain: list of pending biod (for async reading)
|
||||
*
|
||||
* Straight from the textbook - allocate and initialize the bio.
|
||||
* If we're reading, make sure the page is marked as dirty.
|
||||
* Then submit it and, if @bio_chain == NULL, wait.
|
||||
*/
|
||||
static int submit(int rw, struct block_device *bdev, sector_t sector,
|
||||
struct page *page, struct bio **bio_chain)
|
||||
{
|
||||
const int bio_rw = rw | REQ_SYNC;
|
||||
struct bio *bio;
|
||||
|
||||
bio = bio_alloc(__GFP_WAIT | __GFP_HIGH, 1);
|
||||
bio->bi_iter.bi_sector = sector;
|
||||
bio->bi_bdev = bdev;
|
||||
bio->bi_end_io = end_swap_bio_read;
|
||||
|
||||
if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
|
||||
printk(KERN_ERR "PM: Adding page to bio failed at %llu\n",
|
||||
(unsigned long long)sector);
|
||||
bio_put(bio);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
lock_page(page);
|
||||
bio_get(bio);
|
||||
|
||||
if (bio_chain == NULL) {
|
||||
submit_bio(bio_rw, bio);
|
||||
wait_on_page_locked(page);
|
||||
if (rw == READ)
|
||||
bio_set_pages_dirty(bio);
|
||||
bio_put(bio);
|
||||
} else {
|
||||
if (rw == READ)
|
||||
get_page(page); /* These pages are freed later */
|
||||
bio->bi_private = *bio_chain;
|
||||
*bio_chain = bio;
|
||||
submit_bio(bio_rw, bio);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int hib_bio_read_page(pgoff_t page_off, void *addr, struct bio **bio_chain)
|
||||
{
|
||||
return submit(READ, hib_resume_bdev, page_off * (PAGE_SIZE >> 9),
|
||||
virt_to_page(addr), bio_chain);
|
||||
}
|
||||
|
||||
int hib_bio_write_page(pgoff_t page_off, void *addr, struct bio **bio_chain)
|
||||
{
|
||||
return submit(WRITE, hib_resume_bdev, page_off * (PAGE_SIZE >> 9),
|
||||
virt_to_page(addr), bio_chain);
|
||||
}
|
||||
|
||||
int hib_wait_on_bio_chain(struct bio **bio_chain)
|
||||
{
|
||||
struct bio *bio;
|
||||
struct bio *next_bio;
|
||||
int ret = 0;
|
||||
|
||||
if (bio_chain == NULL)
|
||||
return 0;
|
||||
|
||||
bio = *bio_chain;
|
||||
if (bio == NULL)
|
||||
return 0;
|
||||
while (bio) {
|
||||
struct page *page;
|
||||
|
||||
next_bio = bio->bi_private;
|
||||
page = bio->bi_io_vec[0].bv_page;
|
||||
wait_on_page_locked(page);
|
||||
if (!PageUptodate(page) || PageError(page))
|
||||
ret = -EIO;
|
||||
put_page(page);
|
||||
bio_put(bio);
|
||||
bio = next_bio;
|
||||
}
|
||||
*bio_chain = NULL;
|
||||
return ret;
|
||||
}
|
@ -163,15 +163,6 @@ extern void swsusp_close(fmode_t);
|
||||
extern int swsusp_unmark(void);
|
||||
#endif
|
||||
|
||||
/* kernel/power/block_io.c */
|
||||
extern struct block_device *hib_resume_bdev;
|
||||
|
||||
extern int hib_bio_read_page(pgoff_t page_off, void *addr,
|
||||
struct bio **bio_chain);
|
||||
extern int hib_bio_write_page(pgoff_t page_off, void *addr,
|
||||
struct bio **bio_chain);
|
||||
extern int hib_wait_on_bio_chain(struct bio **bio_chain);
|
||||
|
||||
struct timeval;
|
||||
/* kernel/power/swsusp.c */
|
||||
extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *);
|
||||
|
@ -212,7 +212,84 @@ int swsusp_swap_in_use(void)
|
||||
*/
|
||||
|
||||
static unsigned short root_swap = 0xffff;
|
||||
struct block_device *hib_resume_bdev;
|
||||
static struct block_device *hib_resume_bdev;
|
||||
|
||||
struct hib_bio_batch {
|
||||
atomic_t count;
|
||||
wait_queue_head_t wait;
|
||||
int error;
|
||||
};
|
||||
|
||||
static void hib_init_batch(struct hib_bio_batch *hb)
|
||||
{
|
||||
atomic_set(&hb->count, 0);
|
||||
init_waitqueue_head(&hb->wait);
|
||||
hb->error = 0;
|
||||
}
|
||||
|
||||
static void hib_end_io(struct bio *bio, int error)
|
||||
{
|
||||
struct hib_bio_batch *hb = bio->bi_private;
|
||||
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
|
||||
struct page *page = bio->bi_io_vec[0].bv_page;
|
||||
|
||||
if (!uptodate || error) {
|
||||
printk(KERN_ALERT "Read-error on swap-device (%u:%u:%Lu)\n",
|
||||
imajor(bio->bi_bdev->bd_inode),
|
||||
iminor(bio->bi_bdev->bd_inode),
|
||||
(unsigned long long)bio->bi_iter.bi_sector);
|
||||
|
||||
if (!error)
|
||||
error = -EIO;
|
||||
}
|
||||
|
||||
if (bio_data_dir(bio) == WRITE)
|
||||
put_page(page);
|
||||
|
||||
if (error && !hb->error)
|
||||
hb->error = error;
|
||||
if (atomic_dec_and_test(&hb->count))
|
||||
wake_up(&hb->wait);
|
||||
|
||||
bio_put(bio);
|
||||
}
|
||||
|
||||
static int hib_submit_io(int rw, pgoff_t page_off, void *addr,
|
||||
struct hib_bio_batch *hb)
|
||||
{
|
||||
struct page *page = virt_to_page(addr);
|
||||
struct bio *bio;
|
||||
int error = 0;
|
||||
|
||||
bio = bio_alloc(__GFP_WAIT | __GFP_HIGH, 1);
|
||||
bio->bi_iter.bi_sector = page_off * (PAGE_SIZE >> 9);
|
||||
bio->bi_bdev = hib_resume_bdev;
|
||||
|
||||
if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
|
||||
printk(KERN_ERR "PM: Adding page to bio failed at %llu\n",
|
||||
(unsigned long long)bio->bi_iter.bi_sector);
|
||||
bio_put(bio);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
if (hb) {
|
||||
bio->bi_end_io = hib_end_io;
|
||||
bio->bi_private = hb;
|
||||
atomic_inc(&hb->count);
|
||||
submit_bio(rw, bio);
|
||||
} else {
|
||||
error = submit_bio_wait(rw, bio);
|
||||
bio_put(bio);
|
||||
}
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
static int hib_wait_io(struct hib_bio_batch *hb)
|
||||
{
|
||||
wait_event(hb->wait, atomic_read(&hb->count) == 0);
|
||||
return hb->error;
|
||||
}
|
||||
|
||||
/*
|
||||
* Saving part
|
||||
@ -222,7 +299,7 @@ static int mark_swapfiles(struct swap_map_handle *handle, unsigned int flags)
|
||||
{
|
||||
int error;
|
||||
|
||||
hib_bio_read_page(swsusp_resume_block, swsusp_header, NULL);
|
||||
hib_submit_io(READ_SYNC, swsusp_resume_block, swsusp_header, NULL);
|
||||
if (!memcmp("SWAP-SPACE",swsusp_header->sig, 10) ||
|
||||
!memcmp("SWAPSPACE2",swsusp_header->sig, 10)) {
|
||||
memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10);
|
||||
@ -231,7 +308,7 @@ static int mark_swapfiles(struct swap_map_handle *handle, unsigned int flags)
|
||||
swsusp_header->flags = flags;
|
||||
if (flags & SF_CRC32_MODE)
|
||||
swsusp_header->crc32 = handle->crc32;
|
||||
error = hib_bio_write_page(swsusp_resume_block,
|
||||
error = hib_submit_io(WRITE_SYNC, swsusp_resume_block,
|
||||
swsusp_header, NULL);
|
||||
} else {
|
||||
printk(KERN_ERR "PM: Swap header not found!\n");
|
||||
@ -271,10 +348,10 @@ static int swsusp_swap_check(void)
|
||||
* write_page - Write one page to given swap location.
|
||||
* @buf: Address we're writing.
|
||||
* @offset: Offset of the swap page we're writing to.
|
||||
* @bio_chain: Link the next write BIO here
|
||||
* @hb: bio completion batch
|
||||
*/
|
||||
|
||||
static int write_page(void *buf, sector_t offset, struct bio **bio_chain)
|
||||
static int write_page(void *buf, sector_t offset, struct hib_bio_batch *hb)
|
||||
{
|
||||
void *src;
|
||||
int ret;
|
||||
@ -282,13 +359,13 @@ static int write_page(void *buf, sector_t offset, struct bio **bio_chain)
|
||||
if (!offset)
|
||||
return -ENOSPC;
|
||||
|
||||
if (bio_chain) {
|
||||
if (hb) {
|
||||
src = (void *)__get_free_page(__GFP_WAIT | __GFP_NOWARN |
|
||||
__GFP_NORETRY);
|
||||
if (src) {
|
||||
copy_page(src, buf);
|
||||
} else {
|
||||
ret = hib_wait_on_bio_chain(bio_chain); /* Free pages */
|
||||
ret = hib_wait_io(hb); /* Free pages */
|
||||
if (ret)
|
||||
return ret;
|
||||
src = (void *)__get_free_page(__GFP_WAIT |
|
||||
@ -298,14 +375,14 @@ static int write_page(void *buf, sector_t offset, struct bio **bio_chain)
|
||||
copy_page(src, buf);
|
||||
} else {
|
||||
WARN_ON_ONCE(1);
|
||||
bio_chain = NULL; /* Go synchronous */
|
||||
hb = NULL; /* Go synchronous */
|
||||
src = buf;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
src = buf;
|
||||
}
|
||||
return hib_bio_write_page(offset, src, bio_chain);
|
||||
return hib_submit_io(WRITE_SYNC, offset, src, hb);
|
||||
}
|
||||
|
||||
static void release_swap_writer(struct swap_map_handle *handle)
|
||||
@ -348,7 +425,7 @@ err_close:
|
||||
}
|
||||
|
||||
static int swap_write_page(struct swap_map_handle *handle, void *buf,
|
||||
struct bio **bio_chain)
|
||||
struct hib_bio_batch *hb)
|
||||
{
|
||||
int error = 0;
|
||||
sector_t offset;
|
||||
@ -356,7 +433,7 @@ static int swap_write_page(struct swap_map_handle *handle, void *buf,
|
||||
if (!handle->cur)
|
||||
return -EINVAL;
|
||||
offset = alloc_swapdev_block(root_swap);
|
||||
error = write_page(buf, offset, bio_chain);
|
||||
error = write_page(buf, offset, hb);
|
||||
if (error)
|
||||
return error;
|
||||
handle->cur->entries[handle->k++] = offset;
|
||||
@ -365,15 +442,15 @@ static int swap_write_page(struct swap_map_handle *handle, void *buf,
|
||||
if (!offset)
|
||||
return -ENOSPC;
|
||||
handle->cur->next_swap = offset;
|
||||
error = write_page(handle->cur, handle->cur_swap, bio_chain);
|
||||
error = write_page(handle->cur, handle->cur_swap, hb);
|
||||
if (error)
|
||||
goto out;
|
||||
clear_page(handle->cur);
|
||||
handle->cur_swap = offset;
|
||||
handle->k = 0;
|
||||
|
||||
if (bio_chain && low_free_pages() <= handle->reqd_free_pages) {
|
||||
error = hib_wait_on_bio_chain(bio_chain);
|
||||
if (hb && low_free_pages() <= handle->reqd_free_pages) {
|
||||
error = hib_wait_io(hb);
|
||||
if (error)
|
||||
goto out;
|
||||
/*
|
||||
@ -445,23 +522,24 @@ static int save_image(struct swap_map_handle *handle,
|
||||
int ret;
|
||||
int nr_pages;
|
||||
int err2;
|
||||
struct bio *bio;
|
||||
struct hib_bio_batch hb;
|
||||
ktime_t start;
|
||||
ktime_t stop;
|
||||
|
||||
hib_init_batch(&hb);
|
||||
|
||||
printk(KERN_INFO "PM: Saving image data pages (%u pages)...\n",
|
||||
nr_to_write);
|
||||
m = nr_to_write / 10;
|
||||
if (!m)
|
||||
m = 1;
|
||||
nr_pages = 0;
|
||||
bio = NULL;
|
||||
start = ktime_get();
|
||||
while (1) {
|
||||
ret = snapshot_read_next(snapshot);
|
||||
if (ret <= 0)
|
||||
break;
|
||||
ret = swap_write_page(handle, data_of(*snapshot), &bio);
|
||||
ret = swap_write_page(handle, data_of(*snapshot), &hb);
|
||||
if (ret)
|
||||
break;
|
||||
if (!(nr_pages % m))
|
||||
@ -469,7 +547,7 @@ static int save_image(struct swap_map_handle *handle,
|
||||
nr_pages / m * 10);
|
||||
nr_pages++;
|
||||
}
|
||||
err2 = hib_wait_on_bio_chain(&bio);
|
||||
err2 = hib_wait_io(&hb);
|
||||
stop = ktime_get();
|
||||
if (!ret)
|
||||
ret = err2;
|
||||
@ -580,7 +658,7 @@ static int save_image_lzo(struct swap_map_handle *handle,
|
||||
int ret = 0;
|
||||
int nr_pages;
|
||||
int err2;
|
||||
struct bio *bio;
|
||||
struct hib_bio_batch hb;
|
||||
ktime_t start;
|
||||
ktime_t stop;
|
||||
size_t off;
|
||||
@ -589,6 +667,8 @@ static int save_image_lzo(struct swap_map_handle *handle,
|
||||
struct cmp_data *data = NULL;
|
||||
struct crc_data *crc = NULL;
|
||||
|
||||
hib_init_batch(&hb);
|
||||
|
||||
/*
|
||||
* We'll limit the number of threads for compression to limit memory
|
||||
* footprint.
|
||||
@ -674,7 +754,6 @@ static int save_image_lzo(struct swap_map_handle *handle,
|
||||
if (!m)
|
||||
m = 1;
|
||||
nr_pages = 0;
|
||||
bio = NULL;
|
||||
start = ktime_get();
|
||||
for (;;) {
|
||||
for (thr = 0; thr < nr_threads; thr++) {
|
||||
@ -748,7 +827,7 @@ static int save_image_lzo(struct swap_map_handle *handle,
|
||||
off += PAGE_SIZE) {
|
||||
memcpy(page, data[thr].cmp + off, PAGE_SIZE);
|
||||
|
||||
ret = swap_write_page(handle, page, &bio);
|
||||
ret = swap_write_page(handle, page, &hb);
|
||||
if (ret)
|
||||
goto out_finish;
|
||||
}
|
||||
@ -759,7 +838,7 @@ static int save_image_lzo(struct swap_map_handle *handle,
|
||||
}
|
||||
|
||||
out_finish:
|
||||
err2 = hib_wait_on_bio_chain(&bio);
|
||||
err2 = hib_wait_io(&hb);
|
||||
stop = ktime_get();
|
||||
if (!ret)
|
||||
ret = err2;
|
||||
@ -906,7 +985,7 @@ static int get_swap_reader(struct swap_map_handle *handle,
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
error = hib_bio_read_page(offset, tmp->map, NULL);
|
||||
error = hib_submit_io(READ_SYNC, offset, tmp->map, NULL);
|
||||
if (error) {
|
||||
release_swap_reader(handle);
|
||||
return error;
|
||||
@ -919,7 +998,7 @@ static int get_swap_reader(struct swap_map_handle *handle,
|
||||
}
|
||||
|
||||
static int swap_read_page(struct swap_map_handle *handle, void *buf,
|
||||
struct bio **bio_chain)
|
||||
struct hib_bio_batch *hb)
|
||||
{
|
||||
sector_t offset;
|
||||
int error;
|
||||
@ -930,7 +1009,7 @@ static int swap_read_page(struct swap_map_handle *handle, void *buf,
|
||||
offset = handle->cur->entries[handle->k];
|
||||
if (!offset)
|
||||
return -EFAULT;
|
||||
error = hib_bio_read_page(offset, buf, bio_chain);
|
||||
error = hib_submit_io(READ_SYNC, offset, buf, hb);
|
||||
if (error)
|
||||
return error;
|
||||
if (++handle->k >= MAP_PAGE_ENTRIES) {
|
||||
@ -968,27 +1047,28 @@ static int load_image(struct swap_map_handle *handle,
|
||||
int ret = 0;
|
||||
ktime_t start;
|
||||
ktime_t stop;
|
||||
struct bio *bio;
|
||||
struct hib_bio_batch hb;
|
||||
int err2;
|
||||
unsigned nr_pages;
|
||||
|
||||
hib_init_batch(&hb);
|
||||
|
||||
printk(KERN_INFO "PM: Loading image data pages (%u pages)...\n",
|
||||
nr_to_read);
|
||||
m = nr_to_read / 10;
|
||||
if (!m)
|
||||
m = 1;
|
||||
nr_pages = 0;
|
||||
bio = NULL;
|
||||
start = ktime_get();
|
||||
for ( ; ; ) {
|
||||
ret = snapshot_write_next(snapshot);
|
||||
if (ret <= 0)
|
||||
break;
|
||||
ret = swap_read_page(handle, data_of(*snapshot), &bio);
|
||||
ret = swap_read_page(handle, data_of(*snapshot), &hb);
|
||||
if (ret)
|
||||
break;
|
||||
if (snapshot->sync_read)
|
||||
ret = hib_wait_on_bio_chain(&bio);
|
||||
ret = hib_wait_io(&hb);
|
||||
if (ret)
|
||||
break;
|
||||
if (!(nr_pages % m))
|
||||
@ -996,7 +1076,7 @@ static int load_image(struct swap_map_handle *handle,
|
||||
nr_pages / m * 10);
|
||||
nr_pages++;
|
||||
}
|
||||
err2 = hib_wait_on_bio_chain(&bio);
|
||||
err2 = hib_wait_io(&hb);
|
||||
stop = ktime_get();
|
||||
if (!ret)
|
||||
ret = err2;
|
||||
@ -1067,7 +1147,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
unsigned int m;
|
||||
int ret = 0;
|
||||
int eof = 0;
|
||||
struct bio *bio;
|
||||
struct hib_bio_batch hb;
|
||||
ktime_t start;
|
||||
ktime_t stop;
|
||||
unsigned nr_pages;
|
||||
@ -1080,6 +1160,8 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
struct dec_data *data = NULL;
|
||||
struct crc_data *crc = NULL;
|
||||
|
||||
hib_init_batch(&hb);
|
||||
|
||||
/*
|
||||
* We'll limit the number of threads for decompression to limit memory
|
||||
* footprint.
|
||||
@ -1190,7 +1272,6 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
if (!m)
|
||||
m = 1;
|
||||
nr_pages = 0;
|
||||
bio = NULL;
|
||||
start = ktime_get();
|
||||
|
||||
ret = snapshot_write_next(snapshot);
|
||||
@ -1199,7 +1280,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
|
||||
for(;;) {
|
||||
for (i = 0; !eof && i < want; i++) {
|
||||
ret = swap_read_page(handle, page[ring], &bio);
|
||||
ret = swap_read_page(handle, page[ring], &hb);
|
||||
if (ret) {
|
||||
/*
|
||||
* On real read error, finish. On end of data,
|
||||
@ -1226,7 +1307,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
if (!asked)
|
||||
break;
|
||||
|
||||
ret = hib_wait_on_bio_chain(&bio);
|
||||
ret = hib_wait_io(&hb);
|
||||
if (ret)
|
||||
goto out_finish;
|
||||
have += asked;
|
||||
@ -1281,7 +1362,7 @@ static int load_image_lzo(struct swap_map_handle *handle,
|
||||
* Wait for more data while we are decompressing.
|
||||
*/
|
||||
if (have < LZO_CMP_PAGES && asked) {
|
||||
ret = hib_wait_on_bio_chain(&bio);
|
||||
ret = hib_wait_io(&hb);
|
||||
if (ret)
|
||||
goto out_finish;
|
||||
have += asked;
|
||||
@ -1430,7 +1511,7 @@ int swsusp_check(void)
|
||||
if (!IS_ERR(hib_resume_bdev)) {
|
||||
set_blocksize(hib_resume_bdev, PAGE_SIZE);
|
||||
clear_page(swsusp_header);
|
||||
error = hib_bio_read_page(swsusp_resume_block,
|
||||
error = hib_submit_io(READ_SYNC, swsusp_resume_block,
|
||||
swsusp_header, NULL);
|
||||
if (error)
|
||||
goto put;
|
||||
@ -1438,7 +1519,7 @@ int swsusp_check(void)
|
||||
if (!memcmp(HIBERNATE_SIG, swsusp_header->sig, 10)) {
|
||||
memcpy(swsusp_header->sig, swsusp_header->orig_sig, 10);
|
||||
/* Reset swap signature now */
|
||||
error = hib_bio_write_page(swsusp_resume_block,
|
||||
error = hib_submit_io(WRITE_SYNC, swsusp_resume_block,
|
||||
swsusp_header, NULL);
|
||||
} else {
|
||||
error = -EINVAL;
|
||||
@ -1482,10 +1563,10 @@ int swsusp_unmark(void)
|
||||
{
|
||||
int error;
|
||||
|
||||
hib_bio_read_page(swsusp_resume_block, swsusp_header, NULL);
|
||||
hib_submit_io(READ_SYNC, swsusp_resume_block, swsusp_header, NULL);
|
||||
if (!memcmp(HIBERNATE_SIG,swsusp_header->sig, 10)) {
|
||||
memcpy(swsusp_header->sig,swsusp_header->orig_sig, 10);
|
||||
error = hib_bio_write_page(swsusp_resume_block,
|
||||
error = hib_submit_io(WRITE_SYNC, swsusp_resume_block,
|
||||
swsusp_header, NULL);
|
||||
} else {
|
||||
printk(KERN_ERR "PM: Cannot find swsusp signature!\n");
|
||||
|
@ -4387,10 +4387,7 @@ long __sched io_schedule_timeout(long timeout)
|
||||
long ret;
|
||||
|
||||
current->in_iowait = 1;
|
||||
if (old_iowait)
|
||||
blk_schedule_flush_plug(current);
|
||||
else
|
||||
blk_flush_plug(current);
|
||||
blk_schedule_flush_plug(current);
|
||||
|
||||
delayacct_blkio_start();
|
||||
rq = raw_rq();
|
||||
|
@ -69,7 +69,7 @@ void end_swap_bio_write(struct bio *bio, int err)
|
||||
bio_put(bio);
|
||||
}
|
||||
|
||||
void end_swap_bio_read(struct bio *bio, int err)
|
||||
static void end_swap_bio_read(struct bio *bio, int err)
|
||||
{
|
||||
const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
|
||||
struct page *page = bio->bi_io_vec[0].bv_page;
|
||||
|
Loading…
Reference in New Issue
Block a user