[PATCH 11/23][SRU][OEM-5.14] block: remove alloc_disk and alloc_disk_node

[Koba Ko]

From: Christoph Hellwig <hch at lst.de>

BugLink: https://bugs.launchpad.net/bugs/1958850 

Most drivers should use and have been converted to use blk_alloc_disk
and blk_mq_alloc_disk.  Only the scsi ULPs and dasd still allocate
a disk separately from the request_queue, so don't bother with
convenience macros for something that should not see significant
new users and remove these wrappers.

Signed-off-by: Christoph Hellwig <hch at lst.de>
Link: https://lore.kernel.org/r/20210816131910.615153-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe at kernel.dk>
(cherry picked from commit 9c2b9dbafc067e173db30c4fd0636392d27944e8)
Signed-off-by: Koba Ko <koba.ko at canonical.com>
---
 drivers/s390/block/dasd_genhd.c |  5 ++++-
 drivers/scsi/sd.c               |  3 ++-
 drivers/scsi/sr.c               |  4 +++-
 include/linux/genhd.h           | 10 ----------
 4 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index 493e8469893c8..07a69b19dd318 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -24,6 +24,8 @@
 
 #include "dasd_int.h"
 
+static struct lock_class_key dasd_bio_compl_lkclass;
+
 /*
  * Allocate and register gendisk structure for device.
  */
@@ -38,7 +40,8 @@ int dasd_gendisk_alloc(struct dasd_block *block)
 	if (base->devindex >= DASD_PER_MAJOR)
 		return -EBUSY;
 
-	gdp = alloc_disk(1 << DASD_PARTN_BITS);
+	gdp = __alloc_disk_node(1 << DASD_PARTN_BITS, NUMA_NO_NODE,
+				&dasd_bio_compl_lkclass);
 	if (!gdp)
 		return -ENOMEM;
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7e2a6d2bbe055..d0e3155b66dd5 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -129,6 +129,7 @@ static DEFINE_MUTEX(sd_ref_mutex);
 static struct kmem_cache *sd_cdb_cache;
 static mempool_t *sd_cdb_pool;
 static mempool_t *sd_page_pool;
+static struct lock_class_key sd_bio_compl_lkclass;
 
 static const char *sd_cache_types[] = {
 	"write through", "none", "write back",
@@ -3415,7 +3416,7 @@ static int sd_probe(struct device *dev)
 	if (!sdkp)
 		goto out;
 
-	gd = alloc_disk(SD_MINORS);
+	gd = __alloc_disk_node(SD_MINORS, NUMA_NO_NODE, &sd_bio_compl_lkclass);
 	if (!gd)
 		goto out_free;
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index a6d3ac0a6cbce..895630ab9153a 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -106,6 +106,8 @@ static struct scsi_driver sr_template = {
 static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG];
 static DEFINE_SPINLOCK(sr_index_lock);
 
+static struct lock_class_key sr_bio_compl_lkclass;
+
 /* This semaphore is used to mediate the 0->1 reference get in the
  * face of object destruction (i.e. we can't allow a get on an
  * object after last put) */
@@ -712,7 +714,7 @@ static int sr_probe(struct device *dev)
 
 	kref_init(&cd->kref);
 
-	disk = alloc_disk(1);
+	disk = __alloc_disk_node(1, NUMA_NO_NODE, &sr_bio_compl_lkclass);
 	if (!disk)
 		goto fail_free;
 	mutex_init(&cd->lock);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 27b84c7962120..a9c0abdfa6974 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -264,16 +264,6 @@ void blk_drop_partitions(struct gendisk *disk);
 struct gendisk *__alloc_disk_node(int minors, int node_id,
 		struct lock_class_key *lkclass);
 extern void put_disk(struct gendisk *disk);
-
-#define alloc_disk_node(minors, node_id)				\
-({									\
-	static struct lock_class_key __key;				\
-									\
-	__alloc_disk_node(minors, node_id, &__key);			\
-})
-
-#define alloc_disk(minors) alloc_disk_node(minors, NUMA_NO_NODE)
-
 struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass);
 
 /**
-- 
2.25.1