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block: Switch to using refcount_t for zone write plugs

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Replace the raw atomic_t reference counting of zone write plugs with a
refcount_t.  No functional changes.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202411050650.ilIZa8S7-lkp@intel.com/
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20241107065438.236348-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2024-11-07 15:54:38 +09:00 committed by Jens Axboe
parent ab9bc81c1c
commit 4122fef16b
1 changed files with 10 additions and 10 deletions
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20
block/blk-zoned.c
View File

@ -18,7 +18,7 @@
#include <linux/vmalloc.h>
#include <linux/sched/mm.h>
#include <linux/spinlock.h>
#include <linux/atomic.h>
#include <linux/refcount.h>
#include <linux/mempool.h>
#include "blk.h"
@ -64,7 +64,7 @@ static const char *const zone_cond_name[] = {
struct blk_zone_wplug {
struct hlist_node node;
struct list_head link;
atomic_t ref;
refcount_t ref;
spinlock_t lock;
unsigned int flags;
unsigned int zone_no;
@ -411,7 +411,7 @@ static struct blk_zone_wplug *disk_get_zone_wplug(struct gendisk *disk,
hlist_for_each_entry_rcu(zwplug, &disk->zone_wplugs_hash[idx], node) {
if (zwplug->zone_no == zno &&
atomic_inc_not_zero(&zwplug->ref)) {
refcount_inc_not_zero(&zwplug->ref)) {
rcu_read_unlock();
return zwplug;
}
@ -432,7 +432,7 @@ static void disk_free_zone_wplug_rcu(struct rcu_head *rcu_head)
static inline void disk_put_zone_wplug(struct blk_zone_wplug *zwplug)
{
if (atomic_dec_and_test(&zwplug->ref)) {
if (refcount_dec_and_test(&zwplug->ref)) {
WARN_ON_ONCE(!bio_list_empty(&zwplug->bio_list));
WARN_ON_ONCE(!list_empty(&zwplug->link));
WARN_ON_ONCE(!(zwplug->flags & BLK_ZONE_WPLUG_UNHASHED));
@ -463,7 +463,7 @@ static inline bool disk_should_remove_zone_wplug(struct gendisk *disk,
* taken when the plug was allocated and another reference taken by the
* caller context).
*/
if (atomic_read(&zwplug->ref) > 2)
if (refcount_read(&zwplug->ref) > 2)
return false;
/* We can remove zone write plugs for zones that are empty or full. */
@ -533,7 +533,7 @@ again:
INIT_HLIST_NODE(&zwplug->node);
INIT_LIST_HEAD(&zwplug->link);
atomic_set(&zwplug->ref, 2);
refcount_set(&zwplug->ref, 2);
spin_lock_init(&zwplug->lock);
zwplug->flags = 0;
zwplug->zone_no = zno;
@ -624,7 +624,7 @@ static inline void disk_zone_wplug_set_error(struct gendisk *disk,
* finished.
*/
zwplug->flags |= BLK_ZONE_WPLUG_ERROR;
atomic_inc(&zwplug->ref);
refcount_inc(&zwplug->ref);
spin_lock_irqsave(&disk->zone_wplugs_lock, flags);
list_add_tail(&zwplug->link, &disk->zone_wplugs_err_list);
@ -1099,7 +1099,7 @@ static void disk_zone_wplug_schedule_bio_work(struct gendisk *disk,
* reference we take here.
*/
WARN_ON_ONCE(!(zwplug->flags & BLK_ZONE_WPLUG_PLUGGED));
atomic_inc(&zwplug->ref);
refcount_inc(&zwplug->ref);
queue_work(disk->zone_wplugs_wq, &zwplug->bio_work);
}
@ -1444,7 +1444,7 @@ static void disk_destroy_zone_wplugs_hash_table(struct gendisk *disk)
while (!hlist_empty(&disk->zone_wplugs_hash[i])) {
zwplug = hlist_entry(disk->zone_wplugs_hash[i].first,
struct blk_zone_wplug, node);
atomic_inc(&zwplug->ref);
refcount_inc(&zwplug->ref);
disk_remove_zone_wplug(disk, zwplug);
disk_put_zone_wplug(zwplug);
}
@ -1845,7 +1845,7 @@ int queue_zone_wplugs_show(void *data, struct seq_file *m)
spin_lock_irqsave(&zwplug->lock, flags);
zwp_zone_no = zwplug->zone_no;
zwp_flags = zwplug->flags;
zwp_ref = atomic_read(&zwplug->ref);
zwp_ref = refcount_read(&zwplug->ref);
zwp_wp_offset = zwplug->wp_offset;
zwp_bio_list_size = bio_list_size(&zwplug->bio_list);
spin_unlock_irqrestore(&zwplug->lock, flags);