sysfs: Use local reference in compat_only_sysfs_link_entry_to_kobj()

As we have just obtained target_kobj->sd into a local variable, and
incremented the object's reference count, it is better to use the local
variable instead of the original reference.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/r/20210714151559.2532572-1-geert@linux-m68k.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/sysfs/group.c

@@ -446,7 +446,7 @@ int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj,
 	if (!target)
 		return -ENOENT;
 
-	entry = kernfs_find_and_get(target_kobj->sd, target_name);
+	entry = kernfs_find_and_get(target, target_name);
 	if (!entry) {
 		kernfs_put(target);
 		return -ENOENT;