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target: Fix se_tpg_tfo->tf_subsys regression + remove tf_subsystem

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There is just one configfs subsystem in the target code, so we might as
well add two helpers to reference / unreference it from the core code
instead of passing pointers to it around.

This fixes a regression introduced for v4.1-rc1 with commit 9ac8928e6,
where configfs_depend_item() callers using se_tpg_tfo->tf_subsys would
fail, because the assignment from the original target_core_subsystem[]
is no longer happening at target_register_template() time.

(Fix target_core_exit_configfs pointer dereference - Sagi)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig
2015-05-03 08:50:52 +02:00
committed by Nicholas Bellinger
parent ee7619f2eb
commit d588cf8f61
8 changed files with 34 additions and 64 deletions
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drivers/target/target_core_internal.h
-3
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@@ -4,9 +4,6 @@
/* target_core_alua.c */
extern struct t10_alua_lu_gp *default_lu_gp;
/* target_core_configfs.c */
extern struct configfs_subsystem *target_core_subsystem[];
/* target_core_device.c */
extern struct mutex g_device_mutex;
extern struct list_head g_device_list;