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configfs: switch ->default groups to a linked list

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Replace the current NULL-terminated array of default groups with a linked
list.  This gets rid of lots of nasty code to size and/or dynamically
allocate the array.

While we're at it also provide a conveniant helper to remove the default
groups.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Felipe Balbi <balbi@kernel.org>		[drivers/usb/gadget]
Acked-by: Joel Becker <jlbec@evilplan.org>
Acked-by: Nicholas Bellinger <nab@linux-iscsi.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
This commit is contained in:
Christoph Hellwig 2016-02-26 11:02:14 +01:00
parent b1f1a29d8f
commit 1ae1602de0
17 changed files with 281 additions and 629 deletions
Download patch file Download diff file Expand all files Collapse all files

11
include/linux/configfs.h
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@ -96,7 +96,8 @@ struct config_group {
struct config_item cg_item;
struct list_head cg_children;
struct configfs_subsystem *cg_subsys;
struct config_group **default_groups;
struct list_head default_groups;
struct list_head group_entry;
};
extern void config_group_init(struct config_group *group);
@ -123,6 +124,12 @@ extern struct config_item *config_group_find_item(struct config_group *,
const char *);
static inline void configfs_add_default_group(struct config_group *new_group,
struct config_group *group)
{
list_add_tail(&new_group->group_entry, &group->default_groups);
}
struct configfs_attribute {
const char *ca_name;
struct module *ca_owner;
@ -251,6 +258,8 @@ int configfs_register_group(struct config_group *parent_group,
struct config_group *group);
void configfs_unregister_group(struct config_group *group);
void configfs_remove_default_groups(struct config_group *group);
struct config_group *
configfs_register_default_group(struct config_group *parent_group,
const char *name,