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sysfs, kernfs: introduce sysfs_root_sd

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Currently, it's assumed that there's a single kernfs hierarchy in the
system anchored at sysfs_root which is defined as a global struct.  To
allow other users of kernfs, this will be made dynamic.  Introduce a
new global variable sysfs_root_sd which points to &sysfs_root and
convert all &sysfs_root users.

This patch doesn't introduce any behavior difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejun Heo
2013-11-28 14:54:39 -05:00
committed by Greg Kroah-Hartman
parent 9e30cc9595
commit 061447a496
4 changed files with 11 additions and 9 deletions
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4
fs/sysfs/dir.c
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@@ -68,7 +68,7 @@ int sysfs_create_dir_ns(struct kobject *kobj, const void *ns)
if (kobj->parent)
parent_sd = kobj->parent->sd;
else
parent_sd = &sysfs_root;
parent_sd = sysfs_root_sd;
if (!parent_sd)
return -ENOENT;
@@ -134,7 +134,7 @@ int sysfs_move_dir_ns(struct kobject *kobj, struct kobject *new_parent_kobj,
BUG_ON(!sd->s_parent);
new_parent_sd = new_parent_kobj && new_parent_kobj->sd ?
new_parent_kobj->sd : &sysfs_root;
new_parent_kobj->sd : sysfs_root_sd;
return kernfs_rename_ns(sd, new_parent_sd, sd->s_name, new_ns);
}