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Merge tag 'for-4.21/block-20190102' of git://git.kernel.dk/linux-block

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Pull more block updates from Jens Axboe:

 - Dead code removal for loop/sunvdc (Chengguang)

 - Mark BIDI support for bsg as deprecated, logging a single dmesg
   warning if anyone is actually using it (Christoph)

 - blkcg cleanup, killing a dead function and making the tryget_closest
   variant easier to read (Dennis)

 - Floppy fixes, one fixing a regression in swim3 (Finn)

 - lightnvm use-after-free fix (Gustavo)

 - gdrom leak fix (Wenwen)

 - a set of drbd updates (Lars, Luc, Nathan, Roland)

* tag 'for-4.21/block-20190102' of git://git.kernel.dk/linux-block: (28 commits)
  block/swim3: Fix regression on PowerBook G3
  block/swim3: Fix -EBUSY error when re-opening device after unmount
  block/swim3: Remove dead return statement
  block/amiflop: Don't log error message on invalid ioctl
  gdrom: fix a memory leak bug
  lightnvm: pblk: fix use-after-free bug
  block: sunvdc: remove redundant code
  block: loop: remove redundant code
  bsg: deprecate BIDI support in bsg
  blkcg: remove unused __blkg_release_rcu()
  blkcg: clean up blkg_tryget_closest()
  drbd: Change drbd_request_detach_interruptible's return type to int
  drbd: Avoid Clang warning about pointless switch statment
  drbd: introduce P_ZEROES (REQ_OP_WRITE_ZEROES on the "wire")
  drbd: skip spurious timeout (ping-timeo) when failing promote
  drbd: don't retry connection if peers do not agree on "authentication" settings
  drbd: fix print_st_err()'s prototype to match the definition
  drbd: avoid spurious self-outdating with concurrent disconnect / down
  drbd: do not block when adjusting "disk-options" while IO is frozen
  drbd: fix comment typos
  ...
This commit is contained in:
Linus Torvalds
2019-01-02 18:49:58 -08:00
parent b79f9f93eb 427c5ce441
commit 77d0b194b2
23 changed files with 468 additions and 132 deletions
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4
block/bio.c
View File

@@ -2097,8 +2097,12 @@ EXPORT_SYMBOL_GPL(bio_associate_blkg);
*/
void bio_clone_blkg_association(struct bio *dst, struct bio *src)
{
rcu_read_lock();
if (src->bi_blkg)
__bio_associate_blkg(dst, src->bi_blkg);
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(bio_clone_blkg_association);
#endif /* CONFIG_BLK_CGROUP */

23
block/blk-cgroup.c
View File

@@ -438,29 +438,6 @@ static void blkg_destroy_all(struct request_queue *q)
spin_unlock_irq(&q->queue_lock);
}
/*
* A group is RCU protected, but having an rcu lock does not mean that one
* can access all the fields of blkg and assume these are valid. For
* example, don't try to follow throtl_data and request queue links.
*
* Having a reference to blkg under an rcu allows accesses to only values
* local to groups like group stats and group rate limits.
*/
void __blkg_release_rcu(struct rcu_head *rcu_head)
{
struct blkcg_gq *blkg = container_of(rcu_head, struct blkcg_gq, rcu_head);
/* release the blkcg and parent blkg refs this blkg has been holding */
css_put(&blkg->blkcg->css);
if (blkg->parent)
blkg_put(blkg->parent);
wb_congested_put(blkg->wb_congested);
blkg_free(blkg);
}
EXPORT_SYMBOL_GPL(__blkg_release_rcu);
static int blkcg_reset_stats(struct cgroup_subsys_state *css,
struct cftype *cftype, u64 val)
{

4
block/bsg.c
View File

@@ -177,6 +177,10 @@ bsg_map_hdr(struct request_queue *q, struct sg_io_v4 *hdr, fmode_t mode)
goto out;
}
pr_warn_once(
"BIDI support in bsg has been deprecated and might be removed. "
"Please report your use case to linux-scsi@vger.kernel.org\n");
next_rq = blk_get_request(q, REQ_OP_SCSI_IN, 0);
if (IS_ERR(next_rq)) {
ret = PTR_ERR(next_rq);