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target: remove g_device_list 

g_device_list is no longer needed because we now use the idr code
for lookups and seaches.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Mike Christie 2017-06-23 01:18:18 -05:00 committed by Nicholas Bellinger
parent 6906d008b4
commit be50f538e9
3 changed files with 12 additions and 22 deletions
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30
drivers/target/target_core_device.c
View File

@ -49,8 +49,8 @@
#include "target_core_pr.h"
#include "target_core_ua.h"
DEFINE_MUTEX(g_device_mutex);
LIST_HEAD(g_device_list);
DEFINE_MUTEX(device_mutex);
LIST_HEAD(device_list);
static DEFINE_IDR(devices_idr);
static struct se_hba *lun0_hba;
@ -773,7 +773,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
INIT_LIST_HEAD(&dev->delayed_cmd_list);
INIT_LIST_HEAD(&dev->state_list);
INIT_LIST_HEAD(&dev->qf_cmd_list);
INIT_LIST_HEAD(&dev->g_dev_node);
spin_lock_init(&dev->execute_task_lock);
spin_lock_init(&dev->delayed_cmd_lock);
spin_lock_init(&dev->dev_reservation_lock);
@ -895,11 +894,11 @@ struct se_device *target_find_device(int id, bool do_depend)
{
struct se_device *dev;
mutex_lock(&g_device_mutex);
mutex_lock(&device_mutex);
dev = idr_find(&devices_idr, id);
if (dev && do_depend && target_depend_item(&dev->dev_group.cg_item))
dev = NULL;
mutex_unlock(&g_device_mutex);
mutex_unlock(&device_mutex);
return dev;
}
EXPORT_SYMBOL(target_find_device);
@ -943,9 +942,9 @@ int target_for_each_device(int (*fn)(struct se_device *dev, void *data),
iter.fn = fn;
iter.data = data;
mutex_lock(&g_device_mutex);
mutex_lock(&device_mutex);
ret = idr_for_each(&devices_idr, target_devices_idr_iter, &iter);
mutex_unlock(&g_device_mutex);
mutex_unlock(&device_mutex);
return ret;
}
@ -964,13 +963,13 @@ int target_configure_device(struct se_device *dev)
* Add early so modules like tcmu can use during its
* configuration.
*/
mutex_lock(&g_device_mutex);
mutex_lock(&device_mutex);
/*
* Use cyclic to try and avoid collisions with devices
* that were recently removed.
*/
id = idr_alloc_cyclic(&devices_idr, dev, 0, INT_MAX, GFP_KERNEL);
mutex_unlock(&g_device_mutex);
mutex_unlock(&device_mutex);
if (id < 0) {
ret = -ENOMEM;
goto out;
@ -1036,10 +1035,6 @@ int target_configure_device(struct se_device *dev)
hba->dev_count++;
spin_unlock(&hba->device_lock);
mutex_lock(&g_device_mutex);
list_add_tail(&dev->g_dev_node, &g_device_list);
mutex_unlock(&g_device_mutex);
dev->dev_flags |= DF_CONFIGURED;
return 0;
@ -1047,9 +1042,9 @@ int target_configure_device(struct se_device *dev)
out_free_alua:
core_alua_free_lu_gp_mem(dev);
out_free_index:
mutex_lock(&g_device_mutex);
mutex_lock(&device_mutex);
idr_remove(&devices_idr, dev->dev_index);
mutex_unlock(&g_device_mutex);
mutex_unlock(&device_mutex);
out:
se_release_vpd_for_dev(dev);
return ret;
@ -1066,10 +1061,9 @@ void target_free_device(struct se_device *dev)
dev->transport->destroy_device(dev);
mutex_lock(&g_device_mutex);
mutex_lock(&device_mutex);
idr_remove(&devices_idr, dev->dev_index);
list_del(&dev->g_dev_node);
mutex_unlock(&g_device_mutex);
mutex_unlock(&device_mutex);
spin_lock(&hba->device_lock);
hba->dev_count--;

3
drivers/target/target_core_internal.h
View File

@ -56,9 +56,6 @@ struct target_fabric_configfs {
extern struct t10_alua_lu_gp *default_lu_gp;
/* target_core_device.c */
extern struct mutex g_device_mutex;
extern struct list_head g_device_list;
int core_alloc_rtpi(struct se_lun *lun, struct se_device *dev);
struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
void target_pr_kref_release(struct kref *);

1
include/target/target_core_base.h
View File

@ -796,7 +796,6 @@ struct se_device {
struct list_head delayed_cmd_list;
struct list_head state_list;
struct list_head qf_cmd_list;
struct list_head g_dev_node;
/* Pointer to associated SE HBA */
struct se_hba *se_hba;
/* T10 Inquiry and VPD WWN Information */