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kernfs: Clarify lockdep name for kn->count 

The reference count in kernfs_node structure is treated like a rwsem by
using lockdep instrumentation code. The lockdep name, however, is still
"s_active" which is carried over from the old sysfs code. As s_active
is no longer the variable name, its use may confuse users on where the
lock is when it is reported by lockdep. So it is changed to "kn->count"
which is how this variable is normally referenced in kernfs code.

Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Waiman Long 2017-08-17 11:49:56 -04:00 committed by Greg Kroah-Hartman
parent b5f0dc7b4f
commit 39bf04db6b
1 changed files with 1 additions and 1 deletions
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2
fs/kernfs/file.c
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@ -997,7 +997,7 @@ struct kernfs_node *__kernfs_create_file(struct kernfs_node *parent,
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (key) {
lockdep_init_map(&kn->dep_map, "s_active", key, 0);
lockdep_init_map(&kn->dep_map, "kn->count", key, 0);
kn->flags |= KERNFS_LOCKDEP;
}
#endif