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Linux 5.11 compat: blk_{un}register_region()

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As of 5.11 the blk_register_region() and blk_unregister_region()
functions have been retired. This isn't a problem since add_disk()
has implicitly allocated minor numbers for a very long time.

Reviewed-by: Rafael Kitover <rkitover@gmail.com>
Reviewed-by: Coleman Kane <ckane@colemankane.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #11387
Closes #11390
This commit is contained in:
Brian Behlendorf 2020-12-22 14:12:31 -08:00
parent a2621753b2
commit fcd9966ed9
4 changed files with 0 additions and 78 deletions
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24
config/kernel-get-disk-and-module.m4
View File

@ -1,24 +0,0 @@
dnl #
dnl # 4.16 API change
dnl # Verify if get_disk_and_module() symbol is available.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_SRC_GET_DISK_AND_MODULE], [
ZFS_LINUX_TEST_SRC([get_disk_and_module], [
#include <linux/genhd.h>
], [
struct gendisk *disk = NULL;
(void) get_disk_and_module(disk);
])
])
AC_DEFUN([ZFS_AC_KERNEL_GET_DISK_AND_MODULE], [
AC_MSG_CHECKING([whether get_disk_and_module() is available])
ZFS_LINUX_TEST_RESULT_SYMBOL([get_disk_and_module],
[get_disk_and_module], [block/genhd.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GET_DISK_AND_MODULE,
1, [get_disk_and_module() is available])
], [
AC_MSG_RESULT(no)
])
])

2
config/kernel.m4
View File

@ -61,7 +61,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_BIO
ZFS_AC_KERNEL_SRC_BLKDEV
ZFS_AC_KERNEL_SRC_BLK_QUEUE
ZFS_AC_KERNEL_SRC_GET_DISK_AND_MODULE
ZFS_AC_KERNEL_SRC_REVALIDATE_DISK
ZFS_AC_KERNEL_SRC_GET_DISK_RO
ZFS_AC_KERNEL_SRC_GENERIC_READLINK_GLOBAL
@ -159,7 +158,6 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_BIO
ZFS_AC_KERNEL_BLKDEV
ZFS_AC_KERNEL_BLK_QUEUE
ZFS_AC_KERNEL_GET_DISK_AND_MODULE
ZFS_AC_KERNEL_REVALIDATE_DISK
ZFS_AC_KERNEL_GET_DISK_RO
ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL

8
include/os/linux/kernel/linux/blkdev_compat.h
View File

@ -99,14 +99,6 @@ blk_queue_set_read_ahead(struct request_queue *q, unsigned long ra_pages)
#endif
}
#if !defined(HAVE_GET_DISK_AND_MODULE)
static inline struct kobject *
get_disk_and_module(struct gendisk *disk)
{
return (get_disk(disk));
}
#endif
#ifdef HAVE_BIO_BVEC_ITER
#define BIO_BI_SECTOR(bio) (bio)->bi_iter.bi_sector
#define BIO_BI_SIZE(bio) (bio)->bi_iter.bi_size

44
module/os/linux/zfs/zvol_os.c
View File

@ -708,46 +708,6 @@ zvol_getgeo(struct block_device *bdev, struct hd_geometry *geo)
return (0);
}
/*
* Find a zvol_state_t given the full major+minor dev_t. If found,
* return with zv_state_lock taken, otherwise, return (NULL) without
* taking zv_state_lock.
*/
static zvol_state_t *
zvol_find_by_dev(dev_t dev)
{
zvol_state_t *zv;
rw_enter(&zvol_state_lock, RW_READER);
for (zv = list_head(&zvol_state_list); zv != NULL;
zv = list_next(&zvol_state_list, zv)) {
mutex_enter(&zv->zv_state_lock);
if (zv->zv_zso->zvo_dev == dev) {
rw_exit(&zvol_state_lock);
return (zv);
}
mutex_exit(&zv->zv_state_lock);
}
rw_exit(&zvol_state_lock);
return (NULL);
}
static struct kobject *
zvol_probe(dev_t dev, int *part, void *arg)
{
zvol_state_t *zv;
struct kobject *kobj;
zv = zvol_find_by_dev(dev);
kobj = zv ? get_disk_and_module(zv->zv_zso->zvo_disk) : NULL;
ASSERT(zv == NULL || MUTEX_HELD(&zv->zv_state_lock));
if (zv)
mutex_exit(&zv->zv_state_lock);
return (kobj);
}
static struct block_device_operations zvol_ops = {
.open = zvol_open,
.release = zvol_release,
@ -1100,9 +1060,6 @@ zvol_init(void)
return (-ENOMEM);
}
zvol_init_impl();
blk_register_region(MKDEV(zvol_major, 0), 1UL << MINORBITS,
THIS_MODULE, zvol_probe, NULL, NULL);
ida_init(&zvol_ida);
zvol_register_ops(&zvol_linux_ops);
return (0);
@ -1112,7 +1069,6 @@ void
zvol_fini(void)
{
zvol_fini_impl();
blk_unregister_region(MKDEV(zvol_major, 0), 1UL << MINORBITS);
unregister_blkdev(zvol_major, ZVOL_DRIVER);
taskq_destroy(zvol_taskq);
ida_destroy(&zvol_ida);