[PATCH] device property: Make modifications of fwnode "flags" thread safe

[Wolfram Sang]

Hi Doug,

thanks for tackling this issue! I agree it should be fixed, just
wondered about one thing:

> While flags are often modified while under the "fwnode_link_lock",
> this is not universally true.

Is it a possibility to use the lock in all code paths instead?
Because...

>  	struct list_head consumers;
> -	u8 flags;
> +	unsigned long flags;

... this change costs some memory on every system. Maybe it can be
avoided?

Happy hacking,

   Wolfram