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Commit b85dfd30 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.dk/linux-block 

Pull block layer fixes from Jens Axboe:
 "Remember about a week ago when I sent the last pull request for 4.1?
  Well, I lied.  Now, I don't want to shift the blame, but Dan, Ming,
  and Richard made a liar out of me.

  Here are three small patches that should go into 4.1.  More
  specifically, this pull request contains:

   - A Kconfig dependency for the pmem block driver, so it can't be
     selected if HAS_IOMEM isn't availble.  From Richard Weinberger.

   - A fix for genhd, making the ext_devt_lock softirq safe.  This makes
     lockdep happier, since we also end up grabbing this lock on release
     off the softirq path.  From Dan Williams.

   - A blk-mq software queue release fix from Ming Lei.

  Last two are headed to stable, first fixes an issue introduced in this
  cycle"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: pmem: Add dependency on HAS_IOMEM
  block: fix ext_dev_lock lockdep report
  blk-mq: free hctx->ctxs in queue's release handler
parents 7b565d9d b6f2098f

block/blk-mq.c

+6 −2
Original line number Diff line number Diff line
@@ -1600,6 +1600,7 @@ static int blk_mq_hctx_notify(void *data, unsigned long action, 
	return NOTIFY_OK;

}



/* hctx->ctxs will be freed in queue's release handler */

static void blk_mq_exit_hctx(struct request_queue *q,

		struct blk_mq_tag_set *set,

		struct blk_mq_hw_ctx *hctx, unsigned int hctx_idx)
@@ -1618,7 +1619,6 @@ static void blk_mq_exit_hctx(struct request_queue *q, 


	blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);

	blk_free_flush_queue(hctx->fq);

	kfree(hctx->ctxs);

	blk_mq_free_bitmap(&hctx->ctx_map);

}
@@ -1891,8 +1891,12 @@ void blk_mq_release(struct request_queue *q) 
	unsigned int i;



	/* hctx kobj stays in hctx */

	queue_for_each_hw_ctx(q, hctx, i)

	queue_for_each_hw_ctx(q, hctx, i) {

		if (!hctx)

			continue;

		kfree(hctx->ctxs);

		kfree(hctx);

	}



	kfree(q->queue_hw_ctx);

block/genhd.c

+6 −6
Original line number Diff line number Diff line
@@ -422,9 +422,9 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt) 
	/* allocate ext devt */

	idr_preload(GFP_KERNEL);



	spin_lock(&ext_devt_lock);

	spin_lock_bh(&ext_devt_lock);

	idx = idr_alloc(&ext_devt_idr, part, 0, NR_EXT_DEVT, GFP_NOWAIT);

	spin_unlock(&ext_devt_lock);

	spin_unlock_bh(&ext_devt_lock);



	idr_preload_end();

	if (idx < 0)
@@ -449,9 +449,9 @@ void blk_free_devt(dev_t devt) 
		return;



	if (MAJOR(devt) == BLOCK_EXT_MAJOR) {

		spin_lock(&ext_devt_lock);

		spin_lock_bh(&ext_devt_lock);

		idr_remove(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));

		spin_unlock(&ext_devt_lock);

		spin_unlock_bh(&ext_devt_lock);

	}

}
@@ -690,13 +690,13 @@ struct gendisk *get_gendisk(dev_t devt, int *partno) 
	} else {

		struct hd_struct *part;



		spin_lock(&ext_devt_lock);

		spin_lock_bh(&ext_devt_lock);

		part = idr_find(&ext_devt_idr, blk_mangle_minor(MINOR(devt)));

		if (part && get_disk(part_to_disk(part))) {

			*partno = part->partno;

			disk = part_to_disk(part);

		}

		spin_unlock(&ext_devt_lock);

		spin_unlock_bh(&ext_devt_lock);

	}



	return disk;

drivers/block/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -406,6 +406,7 @@ config BLK_DEV_RAM_DAX 


config BLK_DEV_PMEM

	tristate "Persistent memory block device support"

	depends on HAS_IOMEM

	help

	  Saying Y here will allow you to use a contiguous range of reserved

	  memory as one or more persistent block devices.