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Commit 6890ad4b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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

Pull block fixes from Jens Axboe:
 "Final block fixes for 3.16

  Four small fixes that should go into 3.16, have been queued up for a
  bit and delayed due to vacation and other euro duties.  But here they
  are.  The pull request contains:

   - Fix for a reported crash with shared tagging on SCSI from Christoph

   - A regression fix for drbd.  From Lars Ellenberg.

   - Hooking up the compat ioctl for BLKZEROOUT, which requires no
     translation.  From Mikulas.

- A fix for a regression where we woud crash on queue exit if the
  root_blkg is gone/not there. From Tejun"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: provide compat ioctl for BLKZEROOUT
  blkcg: don't call into policy draining if root_blkg is already gone
  drbd: fix regression 'out of mem, failed to invoke fence-peer helper'
  block: don't assume last put of shared tags is for the host
parents d6e6c48e 3b3a1814

block/blk-cgroup.c

+7 −0
Original line number Diff line number Diff line
@@ -872,6 +872,13 @@ void blkcg_drain_queue(struct request_queue *q) 
{

	lockdep_assert_held(q->queue_lock);



	/*

	 * @q could be exiting and already have destroyed all blkgs as

	 * indicated by NULL root_blkg.  If so, don't confuse policies.

	 */

	if (!q->root_blkg)

		return;



	blk_throtl_drain(q);

}

block/blk-tag.c

+7 −26
Original line number Diff line number Diff line
@@ -27,18 +27,15 @@ struct request *blk_queue_find_tag(struct request_queue *q, int tag) 
EXPORT_SYMBOL(blk_queue_find_tag);



/**

 * __blk_free_tags - release a given set of tag maintenance info

 * blk_free_tags - release a given set of tag maintenance info

 * @bqt:	the tag map to free

 *

 * Tries to free the specified @bqt.  Returns true if it was

 * actually freed and false if there are still references using it

 * Drop the reference count on @bqt and frees it when the last reference

 * is dropped.

 */

static int __blk_free_tags(struct blk_queue_tag *bqt)

void blk_free_tags(struct blk_queue_tag *bqt)

{

	int retval;



	retval = atomic_dec_and_test(&bqt->refcnt);

	if (retval) {

	if (atomic_dec_and_test(&bqt->refcnt)) {

		BUG_ON(find_first_bit(bqt->tag_map, bqt->max_depth) <

							bqt->max_depth);
@@ -50,9 +47,8 @@ static int __blk_free_tags(struct blk_queue_tag *bqt) 


		kfree(bqt);

	}



	return retval;

}

EXPORT_SYMBOL(blk_free_tags);



/**

 * __blk_queue_free_tags - release tag maintenance info
@@ -69,27 +65,12 @@ void __blk_queue_free_tags(struct request_queue *q) 
	if (!bqt)

		return;



	__blk_free_tags(bqt);

	blk_free_tags(bqt);



	q->queue_tags = NULL;

	queue_flag_clear_unlocked(QUEUE_FLAG_QUEUED, q);

}



/**

 * blk_free_tags - release a given set of tag maintenance info

 * @bqt:	the tag map to free

 *

 * For externally managed @bqt frees the map.  Callers of this

 * function must guarantee to have released all the queues that

 * might have been using this tag map.

 */

void blk_free_tags(struct blk_queue_tag *bqt)

{

	if (unlikely(!__blk_free_tags(bqt)))

		BUG();

}

EXPORT_SYMBOL(blk_free_tags);



/**

 * blk_queue_free_tags - release tag maintenance info

 * @q:  the request queue for the device

block/compat_ioctl.c

+1 −0
Original line number Diff line number Diff line
@@ -690,6 +690,7 @@ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) 
	case BLKROSET:

	case BLKDISCARD:

	case BLKSECDISCARD:

	case BLKZEROOUT:

	/*

	 * the ones below are implemented in blkdev_locked_ioctl,

	 * but we call blkdev_ioctl, which gets the lock for us

drivers/block/drbd/drbd_nl.c

+6 −0
Original line number Diff line number Diff line
@@ -544,6 +544,12 @@ void conn_try_outdate_peer_async(struct drbd_connection *connection) 
	struct task_struct *opa;



	kref_get(&connection->kref);

	/* We may just have force_sig()'ed this thread

	 * to get it out of some blocking network function.

	 * Clear signals; otherwise kthread_run(), which internally uses

	 * wait_on_completion_killable(), will mistake our pending signal

	 * for a new fatal signal and fail. */

	flush_signals(current);

	opa = kthread_run(_try_outdate_peer_async, connection, "drbd_async_h");

	if (IS_ERR(opa)) {

		drbd_err(connection, "out of mem, failed to invoke fence-peer helper\n");